Session Index

S9. Optical Sensing

Optical Sensing I
Friday, Dec. 1, 2023  13:00-15:00
Presider: Prof. Chien-Hsing Chen (National Pingtung University of Science and Technology, Taiwan) Prof. Chang-Yue Chiang (National Yunlin University of Science and Technology, Taiwan)
Room: 92371 (3F)
13:00 - 13:30
Manuscript ID.  0654
Paper No.  2023-FRI-S0901-I001
Invited Speaker:
Yi-Chung Tung
Control and Sensing Oxygen in Microfluidic Devices for Cell Culture Applications
Yi-Chung Tung, Academia Sinica (Taiwan)

Understanding the influence of oxygen on cellular functions and behaviors is crucial for investigating various physiological and pathological conditions. In order to study cellular responses under specific oxygen microenvironments, various in vitro cell culture models have been developed. However, precise control of oxygen microenvironments and accurate characterization of the oxygen variations with great spatiotemporal resolutions remain challenging. In this talk, I will discuss the appoarches developed in my lab to control the oxygen microenvironments for cell culture using microfluidic devices, and the oxygen sensing scheme based on frequency-domain fluorescence lifetime imaging microscopy (FD-FLIM) for intra- and inter-cellular oxygen characterization.

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13:30 - 13:45 Award Candidate (Paper Competition)
Manuscript ID.  0081
Paper No.  2023-FRI-S0901-O001
Kuan-Yuan Chang Microscopic transmittance spectroscopic measurement with a supercontinuum laser source
Kuan-Yuan Chang, Wen-Tsan Chang, National Yang Ming Chiao Tung University (Taiwan); Jia-Ming Liu, University of California, Los Angeles (USA), National Yang Ming Chiao Tung University (Taiwan)

A supercontinuum laser source emitted from an optical fiber is suitable for developing microscopic transmittance spectroscopy. The spatial resolution of the microscopic transmittance spectrum as a function of the optical wavelength, measurement distance, and sample thickness is quantitatively evaluated.

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13:45 - 14:00 Award Candidate (Paper Competition)
Manuscript ID.  0743
Paper No.  2023-FRI-S0901-O002
Gajendra Suthar, National Yangming Chiaotung University (Taiwan); Yu-Tang Hsiao, Kuen-Wei Tsai, Chuang-Yi Liao, Raynergy Tek Incorporation (Taiwan); Chih-Wei Chu, Academia Sinica (Taiwan); Yi-Ming Chang, Raynergy Tek Incorporation (Taiwan); Fang-Chung Chen, National Yangming Chiaotung University (Taiwan)

This article discusses the impact of morphology on the performance of photomultiplication (PM)-type organic photodetectors (OPDs). A non-fullerene acceptor, Y6-Se-HD, is synthesized and used to fabricate PM-OPDs with a broadband spectral range from 320 to 1090 nm. The devices achieve a maximum EQE value of ~6500% at 860 nm at a low bias of −1.0 V. Morphological analysis shows that Y6-Se-HD covers the entire active layer, avoiding direct contact between the hole-trapping donor polymers and the Ag electrode, resulting in stronger charge trapping and preventing charge recombination and/or quenching. This research highlights the importance of morphological effects on PM-OPDs

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14:00 - 14:15 Award Candidate (Paper Competition)
Manuscript ID.  0794
Paper No.  2023-FRI-S0901-O003
Yi-De Tsai Highly Sensitive Open-cavity Fabry-Pérot Gas Pressure Fiber Sensor Based on Vernier Effect
Yi-De Tsai, Chin-Ping Yu, National Sun-Yat sen University (Taiwan)

A highly sensitive open-cavity FPI gas pressure fiber sensor was proposed with Vernier effect. By using the beveled fiber polishing technology, an open-cavity FPI can be formed. Besides, due to our sensor contains three reflection planes, we can have a sensing FPI and a reference FPI in a compact sensor structure to induce Vernier effect. The measured gas pressure sensing sensitivity is shown to be enhanced to 4.6 times as 133.43pm/psi.

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14:15 - 14:30 Award Candidate (Paper Competition)
Manuscript ID.  0405
Paper No.  2023-FRI-S0901-O004
Cheng-En Tsai Liquid-Index sensor based on a tapered-fiber Bragg grating
Cheng-En Tsai, Yu-Chun Chang, Wen-Fung Liu, Feng-Chia University (Taiwan)

This paper proposed a liquid-index sensor based on a tapered-fiber Bragg grating whose surrounding liquid-index variation by varying the liquid different concentrations to cause the change of grating reflection spectrum and then to obtain the liquid index.

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14:30 - 14:45 Award Candidate (Paper Competition)
Manuscript ID.  0456
Paper No.  2023-FRI-S0901-O005
Yi-Jhen Li Gas Pressure Sensor Based on a Fiber Bragg Grating
Yi-Jhen Li, Wei-Chen Li, Wen-Fung Liu, Feng Chia University (Taiwan)

A novel small-scale high-sensitivity gas pressure sensor based on a fiber grating is proposed in this paper. The sensing structure is to utilize the plastic material cavity to apply the gas pressure on a thin-metal diaphragm glued on a fiber grating to result in the grating wavelength shift with a nice sensitivity of 0.13642 nm/psi and an excellent repeatability.

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14:45 - 15:00 Award Candidate (Paper Competition)
Manuscript ID.  0367
Paper No.  2023-FRI-S0901-O006
Rohit Gupta Enhancing Sensitivity in Plasmonic Biosensors through Voltage
Rohit Gupta, Anuj Chauhan, Hao-Fang Peng, Graduate Institute of Photonics and Optoelectronics (Taiwan); Jian-Jang Huang, Graduate Institute of Photonics and Optoelectronics (Taiwan), Department of Electronics Engineering (Taiwan)

Abstract: We designed and investigated a novel optical biosensor based on a hybrid plasmonic and electrochemical phenomenon. The Surface Plasmon Resonance was generated from a thin layer of gold nanohole array on a glass substrate. Using C-Reactive Protein (CRP) as the target analyte, we tested our device for different concentrations and observed the optical response under various voltage bias conditions. We observed that SPR response is concentration-dependent and can be modulated by varying DC voltages or AC bias frequencies. For CRP concentrations ranging from 1 to 1000 μg/mL, we obtained a limit of detection for this device of 16.5 ng/mL.

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