Prof. Pao T. Lin Profile

Prof. Pao T. Lin

Assistant Professor at Texas A&M Univ

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Author

Publications (8)

Proceedings Article | 17 March 2023 Presentation

Mid-infrared integrated photonics for non-invasive and real-time breath biomarker detection (Conference Presentation)

Pao Lin

Proceedings Volume PC12397, PC1239702 (2023) https://doi.org/10.1117/12.2659237

KEYWORDS: Mid-IR, Integrated photonics, Spectrometers, Microrings, Spectroscopes, Resonators, Remote sensing, Point-of-care devices, Machine learning, Evolutionary algorithms

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Proceedings Article | 13 March 2019 Presentation

Optical waveguides for on-chip fluorescence measurements (Conference Presentation)

Pao Lin, Gerard Cote, Kristen Maitland, Tiening Jin, Junchao Zhou, Paul Gordon, Cyril Soliman

Proceedings Volume 10885, 108850K (2019) https://doi.org/10.1117/12.2508228

KEYWORDS: Waveguides, Luminescence, Finite-difference time-domain method, Microfluidics, Fluorescence spectroscopy, Molecules, Microscopy, High volume manufacturing, Aluminum nitride, Point-of-care devices

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Proceedings Article | 8 March 2019 Presentation

Mid-infrared optical waveguide using ferroelectric oxides (Conference Presentation)

Pao Lin, Tiening Jin, Junchao Zhou

Proceedings Volume 10919, 109191V (2019) https://doi.org/10.1117/12.2508290

KEYWORDS: Waveguides, Mid-IR, Oxides, Photonic integrated circuits, Electro optics, CMOS technology, Microelectronics, Modulation, Scanning electron microscopy, X-ray microscopy

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Proceedings Article | 16 May 2018 Paper

Real-time gas analysis using mid-infrared microcavities

Tiening Jin, Junchao Zhou, Pao Tai Lin

Proceedings Volume 10629, 1062911 (2018) https://doi.org/10.1117/12.2305429

KEYWORDS: Mid-IR, Optical microcavities, Absorption, Sensors, Silicates, Carbon dioxide, Gas sensors, NOx, Silicon, FT-IR spectroscopy

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Proceedings Article | 15 May 2018 Presentation

Real-time and label-free chemical sensing using flexible mid-infrared photonic circuits (Conference Presentation)

Pao Lin

Proceedings Volume 10662, 106620N (2018) https://doi.org/10.1117/12.2305479

KEYWORDS: Mid-IR, Photonic integrated circuits, Biological and chemical sensing, Aluminum nitride, Chemical fiber sensors, Waveguides, Waveguide sensors, Absorption, Bioalcohols, Waveguide modes

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Proceedings Article | 8 May 2018 Presentation + Paper

Advances in infrared GRIN: a review of novel materials towards components and devices

Kathleen Richardson, Myungkoo Kang, Laura Sisken, Anupama Yadav, Cesar Blanco, Michael Antia, Spencer Novak, Charmayne Smith, Andy Buff, Antoine Lepicard, Marc Dussauze, Casey Schwarz, Stephen Kuebler, Chris Grabill, Carlo Pantano, Theresa Mayer, Alexej Pogrebnyakov, Clara Rivero-Baleine, Andrew Kirk, Samantha Mensah, Megan Driggers, Juejun Hu, Pao-Tai Lin, Anuradha Agarwal, Cheng Li, Weiwei Deng

Proceedings Volume 10627, 106270A (2018) https://doi.org/10.1117/12.2304608

KEYWORDS: Glasses, Crystals, Refractive index, GRIN lenses, Infrared radiation, Chalcogenide glass, Ceramics, Heat treatments, Nanocomposites, Ions

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Proceedings Article | 27 July 2016 Presentation

Subwavelength engineered fiber-to-chip silicon-on-sapphire interconnects for mid-infrared applications (Conference Presentation)

Carlos Alonso-Ramos, Zhaohong Han, Xavier Le Roux, Hongtao Lin, Vivek Singh, Pao Tai Lin, Dawn Tan, Eric Cassan, Delphine Marris-Morini, Laurent Vivien, Kazumi Wada, Juejun Hu, Anuradha Agarwal, Lionel C. Kimerling

Proceedings Volume 9891, 98911J (2016) https://doi.org/10.1117/12.2229350

KEYWORDS: Mid-IR, Silicon, Silicon photonics, Sensors, Absorption spectroscopy, Photonic integrated circuits, Sapphire, Lab on a chip

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The mid-Infrared wavelength range (2-20 µm), so-called fingerprint region, contains the very sharp vibrational and rotational resonances of many chemical and biological substances. Thereby, on-chip absorption-spectrometry-based sensors operating in the mid-Infrared (mid-IR) have the potential to perform high-precision, label-free, real-time detection of multiple target molecules within a single sensor, which makes them an ideal technology for the implementation of lab-on-a-chip devices. Benefiting from the great development realized in the telecom field, silicon photonics is poised to deliver ultra-compact efficient and cost-effective devices fabricated at mass scale. In addition, Si is transparent up to 8 µm wavelength, making it an ideal material for the implementation of high-performance mid-IR photonic circuits. The silicon-on-insulator (SOI) technology, typically used in telecom applications, relies on silicon dioxide as bottom insulator. Unfortunately, silicon dioxide absorbs light beyond 3.6 µm, limiting the usability range of the SOI platform for the mid-IR. Silicon-on-sapphire (SOS) has been proposed as an alternative solution that extends the operability region up to 6 µm (sapphire absorption), while providing a high-index contrast. In this context, surface grating couplers have been proved as an efficient means of injecting and extracting light from mid-IR SOS circuits that obviate the need of cleaving sapphire. However, grating couplers typically have a reduced bandwidth, compared with facet coupling solutions such as inverse or sub-wavelength tapers. This feature limits their feasibility for absorption spectroscopy applications that may require monitoring wide wavelength ranges. Interestingly, sub-wavelength engineering can be used to substantially improve grating coupler bandwidth, as demonstrated in devices operating at telecom wavelengths. Here, we report on the development of fiber-to-chip interconnects to ZrF4 optical fibers and integrated SOS circuits with 500 nm thick Si, operating around 3.8 µm wavelength. Results on facet coupling and sub-wavelength engineered grating coupler solutions in the mid-IR regime will be compared.

Proceedings Article | 23 June 2016 Paper

Integrated mid-infrared photonic circuits for label-free biochemical sensing

Pao Tai Lin

Proceedings Volume 9824, 982403 (2016) https://doi.org/10.1117/12.2227049

KEYWORDS: Mid-IR, Photonic integrated circuits, Sensors, Biosensing, Waveguides, Glucose, Absorption, Signal attenuation, Silicon, Molecules

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