Invited Speakers

S1. Nanophotonic Materials and Devices

Chang-Hua Liu Taiwan

National Tsing Hua University

Institute of Photonics Technologies

Title: Novel optoelectronics based on van der Waals heterostructures

In this talk, we will demonstrate novel optoelectronics realized by using band-engineered vdW heterostructures. Specifically, we will show BP-based mid-infrared light emitting diodes and photodetectors that could exhibit excellent optoelectronic properties, including linear-dichroic photoresponses, high speed, high quantum efficiency and long-term stability at room temperature. Via leveraging the integrability of vdW heterostructures, we further show that our developed mid-infrared devices can be readily coupled with mid-infrared SOI waveguides for on-chip sensing and light emissions. Additionally, we will present novel magneto-optoelectronics, accomplished by integrating emerging vdW magnets with monolayer TMDs, and discuss their future potential applications.

Pin-Chieh Wu Taiwan

National Cheng Kung University

Department of Photonics

Title: A Revolution in Nanophotonic Metasurfaces for Flat Optical Applications

There has been plenty of interest and investigation in plasmonic metasurfaces to realize high-performance flat optical components and polarization converter devices [1, 2]. Most reported plasmonic metasurfaces are optimized under the realm of highly-radiative lossy electric and magnetic multipoles, which in fact limit their transmission efficiency [3]. As a result, plasmonic metasurfaces seem not very ideal for real applications in particular after introducing their dielectric counterparts. Nonetheless, it has been shown that dielectric metasurfaces cannot interact with the incident light as strongly as plasmonic structures. The requirement of a high aspect ratio in dielectric metasurfaces further devaluates their practical applications [4].
In this talk, I will present two strategies to realize high-performance metasurfaces for real-world applications. First, we draw our attention to modifying the model that is commonly used for designing a plasmonic metasurface for decades. We innovate a strategy to enhance the transmission efficiency of plasmonic metasurface to the highest attainable level [5, 6]. By integrating a solid nano-structure with its inverse complementary, we realized a plasmonic metasurface with a circular cross-polarization conversion efficiency higher than 50% in transmission at near-infrared wavelengths. Such high optical performance metasurface is achieved by simultaneously exciting the electric, magnetic, and toroidal multipolar modes, which satisfies the generalized Kerker condition and improves the transmission efficiency. We further demonstrate a couple of metasurface-based components such as a beam deflector and a flat focusing lens with record operating efficiency based on the proposed metasurface. Second, we switch the research topic from free space components to integrated devices. We propose that the polarization state of a lasing emission can be actively modulated at source with a metasurface-engaged microcavity, including highly circularly polarized, linearly polarized, or elliptically polarized lasing emission [7]. Taking advantage of strong optical feedback produced by the Fabry-Perot optofluidic microcavity, light-meta-atoms interactions will be enlarged, resulting in polarized lasing emission with high purity and controllability. These studies provide innovative insights into fundamental optics and laser physics, opening new possibilities by bridging metasurface into microlasers and practical applications.

Tien-Chang Lu Taiwan

National Yang Ming Chiao Tung University

Department of Photonics

Title: Active modulation of ZnO plasmonic nanolasers on the graphene-insulator-metal platform

We demonstrate the active modulation of the ZnO nanowire plasmonic nanolaser on the graphene-insulator-metal (GIM) platform at room temperature. With the gate voltage supported by the GIM structure, the accumulation of the charge concentration in graphene or metal depends on the positive or negative gate bias, changing its intrinsic optical properties and affecting the oscillation of the surface plasmon polariton (SPP) mode. Consequently, the lasing threshold of the ZnO nanowire plasmonic nanolaser can be modulated by applying the gate voltage. When the applied gate voltage was tuned from +6 V to -6V, the threshold power of the ZnO nanowire plasmonic nanolaser with a 7-nm-thick Al2O3 layer increased as high as 6.5-fold, which is a significant change and stands for an extraordinary modulation performance. Additionally, after the repeatability measurement, the ZnO nanowire plasmonic nanolaser also exhibited robustness for gate modulation, which benefits it to realize a stable room-temperature operation. Furthermore, by calculating the turn-on dynamics and small-signal frequency response, the modulation speed of the ZnO nanowire plasmonic nanolaser can reach a few THz regions on the GIM platform. Such high-speed modulation makes the ZnO nanowire plasmonic nanolaser show great potential for integrating the laser and optical modulation in the on-chip plasmonic circuit and improving the operation speed.

S2. Optical Waveguides and Communications

Daping ChuUnitted Kingdom

University of Cambridge

Department of Engineering

Title: Polymer-Based Flexible Short-Reach Optical Interconnects

Yin-Chieh LaiTaiwan

National Yang Ming Chiao Tung University

Department of Photonics (DoP)

Title: Development trends of silicon photonics coherent transceivers

Peng-Chun Peng Taiwan

National Taipei University of Technology 

Department of Electro-Optical Engineering

Title: Fiber Wireless Convergence for 6G Mobile Communications

We review emerging technologies including radio-over-fiber and photonic-assisted wireless communication systems, new radio access network architecture design and performance optimization, and enhanced radio access technologies for 6G mobile communications.

S3. Quantum and Laser Technology

Yu-Jung Lu Taiwan

Academia Sinica

Research Center for Applied Sciences

Title: Emerging Materials for Plasmonics in the Visible Region: From Discovery to Application

Progress in understanding resonant subwavelength optical structures has fueled a worldwide explosion of interest in both fundamental processes and nanophotonic/plasmonic devices for imaging, sensing, solar energy conversion, and information processing. However, plasmonic platforms in the visible region with robust, high performance, thermo-stable, and low-cost remains remain unexplored. In this presentation, I will particularly discuss emerging plasmonic platforms based on transition metal nitrides. I will present an overview of my research works over the past five years on the plasmon-enhanced light-matter interactions in the visible regions and its applications [1-6], including the plasmonic nanolasers [1-2], tunable plasmonic modulators [3], plasmonic phototransistors [4], plasmon-enhanced solar energy harvesting [5], and the refractory plasmonic colors for back-light free displays [6]. My group discovered several unique working mechanisms that utilize plasmonic nanostructures to improve optoelectronic device performance. By engineering the local electromagnetic field confinement, the light-matter interaction strength can be enhanced, which results in efficient energy conversion in the designed nanosystem. The detailed mechanisms and possible applications will be discussed. These results have broad implications for the use of plasmonic crystals/metasurfaces in high-performance optoelectronic devices with efficient energy conversion.

Ming-Hsiung WuTaiwan

National Tsing Hua University

Institute of Photonics Technologies

Title: Toward MW Tunable Coherent THz Parametric Source

We have generated 0.2~0.3-MW peak power at 5.7 THz from a KTP difference-frequency generator. In my presentation, I will update the audience our most recent result toward generation of MW power from our unique source.

Ming-Chang Chen Taiwan

National Tsing Hua University

Institute of Photonics Technologies

Title: Generation of isolated-attosecond pulses driven by a post-compressed Yb laser

We introduce a new post-compression to achieve 50-fold compression of millijoule-level pulses at 1030 nm from 157 fs to 3.1 fs, with an output pulse energy of 0.98 mJ and an overall efficiency of 73%. When driving high-harmonic generation, these singlecycle pulses enable the creation of isolated ≈ 290-attosecond pulses.

S4. Optical Information Processing and Holography

Yoshio Hayasaki Japan

Utsunomiya University

Center for Optical Research and Education (CORE)

Title: Holographic optical engine (HolOE) for material laser processing with high-throughput, high

The holographic optical engine that is composed of a spatial light modulator (SLM), image sensors, relay optics, and a control computer performs an optimization of a computergenerated hologram (CGH) in an optical system. The CGH optimized before or during laser processing generates two- and three-dimensional focusing spots with an automatic compensation of static imperfections and dynamic changes in the optical system, therefore the holographic laser processing is performed with high stability, high-throughput, and high usability

Wei-Chia SuTaiwan

National Changhua University of Education

Department and Graduate Institute of Physics

Title: Volume Holographic Optical Element on Lightguide for Near-eye Display Application

Near-eye display systems based on lightguide structure will be presented in this talk. Volume holographic optical elements (VHOEs) are generated and are attached on the lightguide for images in-coupling and out-coupling in a near-eye display system. Different VHOEs are designed and fabricated for two different image sources. A full-color display with FOV of 30° is achievable with a planar display image. In addition, a monochromatic display with FOV of 23° is presented when using computer-generated hologram (CGH) as image source.

Chung-Hao Tien Taiwan

National Yang Ming Chiao Tung University

Department of Photonics

Title: Deep Learning for Unconventional Optics: Reconstruction, Inference and More

Instead of traditional image models, which accompany various prior conditions and feature engineering, in recent years, data-driven deep learning network models have gradually become attractive. Based on a lensless configuration with ordinary white light (completely noncoherent), a coded mask (or diffuser) as an example to modulate the light field, the CMOS sensor measures the intermediate image, we employed the convolutional neural network (CNN) architecture to reconstruct the readily uninterpretable signal. In addition to the reconstruction, we also conducted the face recognition as the vision task. Practical implications through such unconventional optics will be expected if pattern recognition, rather than relying mostly on human recognizable fidelity as it does in conventional imaging system, become more directly linked to the hidden or incomplete optical fields. More possibilities will be addressed during the conference presentation

Yeh-Wei Yu Taiwan

National Central University

Department of Optics and Photonics

Title: Efficiency coefficient of holographic data storage system

Conventional calculation of performance based on M/# assumes the diffraction efficiency as a simple function of the material thickness. It ignores the three-dimensional distribution of refractive index, which contributes to different diffraction efficiency, and always leads to over-evaluation of the storage capacity. Therefore, we proposed an efficiency coefficient to calculate the diffraction efficiency per refractive index consumption

Hung-Chih Hsieh Taiwan

National United University

Department of Electro-Optical Engineering

Title: Optimized Measurement Wavelength Selection of Diffraction-based Overlay Metrology with Asymmetric Target by Finite-difference Time-domain Simulation

The overlay (OVL) measurement is an essential process control element of a scanner in advanced lithography. According to the report of the International Roadmap for Devices and System 2020, the OVL tolerance of a scanner decreases as the semiconductor process node advances. For example, the allowable OVL value is about 3.6 nm in the case of the dynamic random-access memory (DRAM) components, and the required OVL metrology precision must be as small as 10% of the allowable OVL value, i.e., 0.36nm. The diffraction-based measurement (DBO) was widely used as the technology node less than 20nm. The DBO metrology has overlapping targets, and the OVL value is determined by measuring an intensity unbalance in diffracted light. According to the DBO measurement principle, the measured OVL signal is an asymmetric diffraction signal generated by the measurement target, and a linear calculation model calculates the OVL value. However, since the wafer processing effect of the etching process and the chemical-mechanical polish (CMP) process caused the deformation of the measurement target profile, and then it will result in the OVL measurement error. Hence, in this paper, we proposed a robust and wafer-less measurement wavelength selection methodology based on the FDTD simulation for the measurement target with an asymmetric profile structure

S5. Optical Design, Testing and Engineering

Daewook Kim USA

University of Arizona

Optical sciences and astronomy

Title: Closed-Loop Adaptive Thermoforming Process of Precision Antenna Panels

Future large-scale radio telescope array observatories, such as the next-generation Very Large Array, involve extremely large collection areas of antenna. These collection areas are divided into smaller panel segments, which typically require their own uniquely shaped molds to manufacture. For these projects to be cost-effective to support the science community, efficient fabrication and flexible metrology of the many differently-shaped freeform panels are needed. This paper summarizes the development of an adaptive freeform panel molding technology that greatly improves manufacturing efficiency due to its repeatable and reusable nature

Johann Du Toit South Africa

Simera Sense

Title: Exploring NewSpace approach for earth observation payloads


Kenji Konno Japan

Konica Minolta

Title: Progress in color and light measurement instruments

Color and brightness are human perceptions, not physical quantities like spectrum or energy.
International standards play an important role in quantifying color and brightness.
Various types of chromatic measuring instruments can output colorimetric values in accordance with international standards.
This presentation will give examples of how various color measurement instruments are used in real industries and introduce the latest progress of instruments.
Finally, the friendship between the optical societies of Taiwan and Japan will be mentioned.

S6. Biophotonics and Biomedical Imaging

Sheng-Hao Tseng Taiwan

National Cheng Kung University

Department of Photonics

Title: Model-driven diffuse reflectance spectroscopy for retrieving various local and systematic functional parameters of the human body

Diffuse spectroscopy, a variant of diverse spectroscopic methods, has been used for investigating tissue properties for decades. This technique can work with proper models to noninvasively quantify chromophore concentrations of bulk tissues. Models designed for deep tissue interrogation have been established to enable the application of diffuse spectroscopy for studying the dynamics of functional parameters of deep tissues, such as stimulation-induced hemodynamics of the brain or muscle, or the variation of water and fat concentrations of breasts caused by chemotherapy. On the other hand, due to the strong stochastic nature of light propagation in turbid media near the light source, building models for superficial tissue studies have been a challenging task and thus this topic has been vastly studied in recent years. In this talk, I will discuss the attempts we have made to develop useful models that can work in conjunction with specialized diffuse reflectance spectroscopy configurations for the effective evaluation of functional parameters of superficial tissues such as skin collagen, hemoglobin, bilirubin, and glucose. It will also be illustrated how these local and systematic functional parameters are related to the monitoring or diagnosis of numerous diseases such as keloid, psoriasis, jaundice, and diabetes.

Bi-Chang Chen Taiwan

Academia Sinica

Research Center for Applied Sciences

Title: Probing the protein orientation at its native state

3D optical imaging of biological tissue at high spatial resolution over a large scale bridges the observation and understanding of biological systems at cellular and tissue level. Imaging and reconstruction of physically sectioned tissue slices was perhaps the only way to perform such study. Although it is possible to achieve submicron, even super resolution by imaging thin tissue slices, the method wasn’t widely adopted due to the technical limitations and practical difficulties to implement the technique in different researches. 
Expansion microscopy (ExM) is an emerging technology that enables biological samples to be imaged with nanoscale precision and resolution on ordinary, diffraction-limited microscopes.  ExM generally works by physically magnifying a specimen in a uniform (isotropic) manner in three dimensions, which could easily achieve super-resolved image on the diffraction-limited microscope. 
The holy grail in optical microscopy is imaging 3D biological specimen with the resolution, the same as in electron microscopy. Electron microscopy (EM) has a lot better spatial resolution but no color information and presumably limited to 2D. Instead, optical microscopy has chemical information due to fluorescent labeling with 3D fashion. Here, we are performing lightsheet microscopy combined with expansion microscopy to let optical microscopy meet electron microscopy and aim to map the orientation of the protein of interest at the intact tissue without physically sectioning.

Chia-Lung Hsieh Taiwan

Academia Sinica

Institute of Atomic and Molecular Sciences (IAMS)

Title: Label-free imaging of nanoscale cell dynamics by scattering-based optical interference microscopy

Cell imaging largely relies on fluorescence-based microscopy because of the high detection sensitivity and molecular specificity achieved by labeling the sample with fluorophores. Unfortunately, resolving nanoscopic cell dynamics remains a challenge due to the photobleaching of fluorophores. In this talk, I will present scattering-based optical interference microscopy that facilitates direct visualization of nano-dynamics in living cells. The linear scattering signal is stable and indefinite, supporting sensitive and precise measurements at a high speed. Using common-path interferometry, the scattering imaging is highly sensitive, enabling direct observation of nano-sized biological objects. With proper image data analysis, organelle specific, high-resolution cell images can be obtained without any labels. Using our methods, rapid biological processes occurring in the millisecond timescale are resolved at high spatiotemporal resolution, including remodeling of chromatin and endoplasmic reticulum network. The label-free optical interference microscopy offers the opportunity to explore nanoscale cell dynamics with unprecedented details

Kung-Bin Sung Taiwan

National Taiwan University

Graduate Insititute of Photonics and Optoelectronics

Title: Non-invasive optical sensing of pathological and physiological parameters from tissue in vivo 

Optical techniques have been increasingly applied to the screening and diagnosis of diseases, as well as non-invasive monitoring and surveillance of physiological states of tissue in vivo. For such sensing purposes, photons entering the tissue undergo multiple scattering events, and some of the photons not absorbed by the tissue return to the tissue surface and get detected. To accurately quantify pathological or physiological parameters from multi-dimensional data, the Monte Carlo (MC) method for solving the radiative transport problem has been developed and treated as the gold standard. However, a significant drawback of MC simulations is the high computational cost which hinders real-time processing. To address this issue, our group has adopted artificial neural networks to speed up MC simulations in several applications to quantify tissue optical properties in vivo. Examples include (1) absorption of melanin in the skin, (2) the strength of auto-fluorescence from the mucosa of the cervical uterine for detecting precancerous lesions, (3) scattering and absorption coefficients of major tissues in the human head to improve functional mapping of the brain activity and dosage quantification in transcranial brain stimulation, and (4) changes in oxygen saturation of venous blood. 

S7. Display and Solid State Lighting

Chih-Lung Lin Taiwan

National Cheng Kung University

Department of Electrical Engineering

Title: Driving Schemes for AMOLED and Micro-LED Displays

Chi-Chang Liao Taiwan

IRIS Optronics Co., Ltd

Title: There is light; there is infinity display

Unique Characteristics of Cholesteric Liquid Crystal Display
  • Vivid picture - Infinite Color
  • Self-powered by solar cell - Infinite Power
  • Various application - Infinite Usage Scenario

S8. Thin Film and Photovoltaic Technology

Ray-Hua Horng Taiwan

National Yang Ming Chiao Tung University

Institute of Electronics

Title: Wide bandgap semiconductors epitaxial growth and related device applications

The wide bandgap semiconductors ZnGa2O4 and Ga2O3 were grown on c-plane sapphire substrates by metalorganic chemical vapor deposition (MOCVD). For the epilayers growth, the flow rate of metalorganic (Mo) source and growth temperature were variated, while the flow rates of O2 were fixed at 1000 sccm, respectively. The effect of Mo flow rate on the structural, cathodoluminescence (CL), and optoelectronic properties of wide bandgap semiconductors were analyzed. The photodetector, x-ray photodetectors, power devices applications will also be discussed in this talk.

Ching-Yuan Su Taiwan

National Central University

Department of Mechanical Engineering

Title: Synthesis and integration of 2D materials for advanced nanoelectronics

In this talk, the first part, the study of in-situ cleaning and selective functionalization of 2D layered material, where the selective functionalization and passivation not only enhanced stability in the air but also highly improve the electrical properties of field-effect transistor (FET), with the high on-current and enhanced carrier mobility and on/off ratio. Also, the BP as functional active layers for artificial synapse memristors will be demonstrated. In the second part, I will introduce the efficient and reliable method for the transferring of graphene and other 2D materials with higher integrity and ultraclean surface, which is beneficial for the following BEOL device integration.

S9. Optical Sensing

Pei-Kuen Wei Taiwan

Academia Sinica

Research Center for Applied Sciences

Title: Nano-Plasmonic Imaging Method for Microfluidic Digital Immunoassays

Digital immunoassays with multiplexed capacity, high sensitivity, and high-throughput operation are urgently required in biomedical diagnosis, food safety and environmental monitoring. We developed gold nanostructures-based nanoplasmonic imaging method and applied it for digital immune analysis. Compared to current digital immunoassays that need fluorescent labeling and second antibody, the proposed nanoplasmonic imaging technology (NIT) can identify surface binding effect on single gold nanoparticle without any further labeling and reporting antibody. In this talk, the NIT method will be introduced and compared with other detection methods. The NIT will be used for detecting LSPR signals of gold nanoparticles and counted the antibody-antigen interactions for each single nanoparticles. The digital detections enhance the detection limit from ug/mL to pg/mL. It also takes advantages in the real application of complicated medium. Examples of detecting the spike protein of Covid-19 in salvia and pesticides in real samples will be presented

Nguyen Van Hieu Vietnam

University of Science, VNUHCM

Department of Physics and Electronics Engineering

Title: The study of Deep-Ultraviolet Light-Emitting Diodes (UVLEDs) with Multi Quantum Wells (MQWs) structures for the sterilization and ozone concentration. 

In this work, the UVLED structures with multi-quantum wells (MQWs) were studied to calculate the physical and optical properties by SiLENse (Simulator of Light Emitters based on Nitride Semiconductors) software. The several structures of ultraviolet light-emitting diodes (UVLEDs) with their emission range from 250nm to 380nm were studied. The output parameters of their structures are included: band diagram, emission spectra, current-voltage (I-V) characteristic, Internal Quantum Efficiency,... The dependence of the emission wavelength to the structural parameter of uvled (as Al component in AlxInyGa1-xN layer, layer thickness and the number of MQWs, doping concentration, thickness of the layers buffer /barrier…) were determined. 

S10. Metaverse Photonics

Yao-Wei HuangTaiwan

National Yang Ming Chiao Tung University

Department of Photonics

Title: Large-scale RGB-achromatic Metalens for Virtual Reality and Augmented Reality

Chih-Wei HuangTaiwan

National Central University

Department of Communication Engineering

Title: Machine Learning-based 3D Visual Positioning

3D Visual positioning is a critical function in applications such as navigation and extended reality (XR) experiences. Recently, machine learning technologies have been actively applied to the positioning task. In this talk, advances in machine learning-based 3D visual positioning will be firstly introduced. Also, our latest works on 3D point cloud mapping and simultaneous localization and mapping (SLAM) acceleration will be presented. By utilizing a branch convolutional neural network (B-CNN) model, the "zoom-in" equivalent property results in favorable positioning accuracy and successful real-time implementation. Furthermore, deep neural networks can also be utilized to predict the iteration outcomes from the bundle adjustment (BA) in SLAM and achieve the same level of accuracy in a much shorter period.

Richard HuTaiwan


Title: Fully automated solution for metalenses/metasurfaces with inverse design capability

Metalenses are a promising new optical technology with applications in AR/VR, biomedical imaging, and wearable consumer electronics. Owing to their planar profiles and versatility, they allow for a dramatic miniaturization of existing optical systems while realizing complex new optical functions. MetaOptic Designer, a fully automated design tool has been developed using inverse design techniques adapted for systems containing cascaded metasurfaces with arbitrary configurations of parameterized meta-atoms. The optimized layout is obtained automatically based on specified target functions. The performance of the optimized metalens system can then be validated by different simulation approaches. Several design examples will be presented to demonstrate the capability and usability of this powerful design flow.

Chuan-Chung Chang Taiwan

Coretronic Corporation

Advanced Optical Technology Center

Title: Tradeoff and system consideration for AR optical engine

Comparison from technical to performance for different optical configuration, micro display panel and optical combiner will be given during the talks, which focus on AR optical engine to glasses especially. Several AR HMD and Glasses will be illustrated as example, and newest process in industry will be included also.

 Important Dates

Paper Submission Opening:

Paper Submission Deadline
2022/09/19(Final Extension)

Postdeadline Submission:

Registration Opening

Acceptance Notification

Early Bird Registration Deadline

Online Registration Deadline

Conference Days: