Dr. Chi-Jui Chung Profile

Dr. Chi-Jui Chung

at Univ of Texas at Austin

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Author

Publications (17)

Proceedings Article | 26 February 2020 Presentation + Paper

Ultrafast self-induced oscillation in a nonlinear subwavelength grating metamaterial ring resonator

Xiaochuan Xu, Yang Wang, Zeyu Pan, Chi-jui Chung, Yue Cheng, Yaguo Wang, Tsuyoshi Michinobu, Ray Chen

Proceedings Volume 11285, 112850H (2020) https://doi.org/10.1117/12.2544344

KEYWORDS: Resonators, Neurons, Picosecond phenomena, Metamaterials, Silicon, Ultrafast phenomena, Waveguides, Absorption, Silicon photonics

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Proceedings Article | 19 March 2019 Presentation + Paper

Dielectric metamaterial waveguide for optical interconnect and sensing

Xiaochuan Xu, Zeyu Pan, Chi-Jui Chung, Ching-Wen Chang, Hai Yan, Ray Chen

Proceedings Volume 10924, 109240T (2019) https://doi.org/10.1117/12.2513817

KEYWORDS: Waveguides, Silicon, Refractive index, Sensors, Metamaterials, Resonators, Silicon photonics, Modulators, Optical interconnects, Optical sensing

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Proceedings Article | 4 March 2019 Paper

Compact integrated photonic components for lambda=3-15 micron

Swapnajit Chakravarty, Jason Midkiff, Kyoungmin Yoo, Chi-Jui Chung, Ali Rostamian, Ray Chen

Proceedings Volume 10921, 109210D (2019) https://doi.org/10.1117/12.2508885

KEYWORDS: Waveguides, Polarization, Cladding, Quantum cascade lasers, Wave propagation, Mid-IR, Silicon, Sensors, Indium gallium arsenide, Etching

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Proceedings Article | 4 March 2019 Presentation

On-chip Fourier transform spectrometer on silicon-on-sapphire (Conference Presentation)

Elham Heidari, Xiaochuan Xu, Chi-Jui Chung, Ray Chen

Proceedings Volume 10923, 109230O (2019) https://doi.org/10.1117/12.2510519

KEYWORDS: Fourier transforms, Spectroscopy, Silicon, Infrared spectroscopy, Infrared radiation, Gases, Chemical species, Free space optics, Planets, FT-IR spectroscopy

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Proceedings Article | 14 March 2018 Presentation

On-chip microwave photonic sensor featuring silicon-polymer hybrid subwavelength grating waveguide and bowtie antenna (Conference Presentation)

Chi-Jui Chung, Xiaochuan Xu, Farzad Mokhtari-Koushyar, Ray Chen

Proceedings Volume 10535, 105350G (2018) https://doi.org/10.1117/12.2290982

KEYWORDS: Antennas, Waveguides, Sensors, Microwave radiation, Microwave photonics, Polymers, Silicon, Electro optic polymers, Polymer multimode waveguides, Signal detection

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Proceedings Article | 2 March 2018 Paper

High-speed modulator based on electro-optic polymer infiltrated subwavelength grating waveguide ring resonator

Zeyu Pan, Xiaochuan Xu, Chi-Jui Chung, Hamed Dalir, Hai Yan, Ke Chen, Yaguo Wang, Baohua Jia, Ray Chen

Proceedings Volume 10538, 105381E (2018) https://doi.org/10.1117/12.2291366

KEYWORDS: Silicon, Waveguides, Modulators, Electro optic polymers, Optical interconnects, Resonators, Polymer multimode waveguides, Polymers, Optical modulators, Sensors

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Proceedings Article | 28 April 2017 Presentation

High speed attojoule/bit passive and active nanophotonic devices for computing and optical interconnects (Conference Presentation)

Zeyu Pan, Cheng Zhang, Harish Subbaraman, Chi-Jui Chung, Qiaochu Li, Xiaochuan Xu, Xingyu Zhang, L. Jay Guo, Ray Chen

Proceedings Volume 10109, 1010910 (2017) https://doi.org/10.1117/12.2254780

KEYWORDS: Nanophotonics, Active optics, Geometrical optics, Optical interconnects, Electro optic polymers, Printing, Polymers, Logic devices, Logic, Electro optics

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Proceedings Article | 19 April 2017 Presentation

Ultra-compact electromagnetic wave sensor featuring electro-optics polymer infiltrated one-dimensional photonic-crystal-slotted waveguide (Conference Presentation)

Chi-Jui Chung, Zeyu Pan, Rui Wang, Xiaochuan Xu, Harish Subbaraman, Ray Chen

Proceedings Volume 10103, 101030J (2017) https://doi.org/10.1117/12.2253673

KEYWORDS: Electromagnetic radiation, Planar waveguides, Waveguides, Antennas, Sensors, Polymers, Electro optic polymers, Modulation, Silicon, Teeth

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Proceedings Article | 20 February 2017 Presentation + Paper

One-dimensional photonic crystal slot waveguide for silicon-organic hybrid electro-optic modulators

Hai Yan, Xiaochuan Xu, Chi-Jui Chung, Harish Subbaraman, Zeyu Pan, Swapnajit Chakravarty, Ray Chen

Proceedings Volume 10109, 101090O (2017) https://doi.org/10.1117/12.2253154

KEYWORDS: Waveguides, Silicon, Modulators, Photonic crystals, Electrooptic modulators, Phase shifts, Slow light, Optical interconnects, Electro optic polymers, Electro optics, Polymers, Teeth, Polymer multimode waveguides, Light wave propagation, Electrodes

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Proceedings Article | 2 May 2016 Paper

Towards a fully packaged high-performance RF sensor featuring slotted photonic crystal waveguides

Chi-Jui Chung, Harish Subbaraman, Xingyu Zhang, Hai Yan, Jingdong Luo, Alex K.-Y. Jen, Robert Nelson, Charles Y.-C. Lee, Ray Chen

Proceedings Volume 9747, 97471V (2016) https://doi.org/10.1117/12.2213557

KEYWORDS: Sensors, Photonic crystals, Waveguides, Antennas, Polymers, Electro optics, Slow light, Electro optic polymers, Microwave remote sensing, Silicon photonics, Silicon, Silica, Electromagnetism, Modulation

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Proceedings Article | 4 April 2016 Paper

Miniature mid-infrared thermooptic switch with photonic crystal waveguide based silicon-on-sapphire Mach–Zehnder interferometers

Yi Zou, Swapnajit Chakravarty, Chi-Jui Chung, Ray Chen

Proceedings Volume 9753, 97530Q (2016) https://doi.org/10.1117/12.2214440

KEYWORDS: Silicon, Waveguides, Photonic crystals, Mid-IR, Sapphire, Thermal optics, Switches, Modulation, Switching, Modulators

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Proceedings Article | 14 March 2016 Paper

Design of a plasmonic-organic hybrid slot waveguide integrated with a bowtie-antenna for terahertz wave detection

Xingyu Zhang, Chi-Jui Chung, Harish Subbaraman, Zeyu Pan, Chin-Ta Chen, Ray Chen

Proceedings Volume 9756, 975614 (2016) https://doi.org/10.1117/12.2213174

KEYWORDS: Waveguides, Plasmonics, Silicon, Antennas, Terahertz radiation, Polymers, Sensors, Metals, Wave sensors, Polymer multimode waveguides

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Proceedings Article | 14 March 2016 Paper

Microheater-integrated silicon coupled photonic crystal microcavities for low-power thermo-optic switching over a wide spectrum

Xingyu Zhang, Swapnajit Chakravarty, Chi-Jui Chung, Zeyu Pan, Hai Yan, Ray Chen

Proceedings Volume 9752, 975214 (2016) https://doi.org/10.1117/12.2213152

KEYWORDS: Optical microcavities, Switching, Switches, Silicon, Photonic crystals, Molecular photonics, Thermal optics, Resonators, Waveguides, Microrings

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Proceedings Article | 3 April 2015 Paper

Broadband energy-efficient optical modulation by hybrid integration of silicon nanophotonics and organic electro-optic polymer

Xingyu Zhang, Amir Hosseini, Harish Subbaraman, Jingdong Luo, Alex K.- Jen, Chi-jui Chung, Hai Yan, Zeyu Pan, Robert Nelson, Ray Chen

Proceedings Volume 9368, 93680K (2015) https://doi.org/10.1117/12.2079686

KEYWORDS: Modulation, Silicon, Modulators, Polymers, Waveguides, Electrodes, Optical modulators, Photonic crystals, Electro optic polymers, Integrated optics

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Proceedings Article | 14 March 2015 Paper

Antenna-coupled silicon-organic hybrid integrated photonic crystal modulator for broadband electromagnetic wave detection

Xingyu Zhang, Amir Hosseini, Harish Subbaraman, Shiyi Wang, Qiwen Zhan, Jingdong Luo, Alex Jen, Chi-jui Chung, Hai Yan, Zeyu Pan, Robert Nelson, Charles Lee, Ray Chen

Proceedings Volume 9362, 93620O (2015) https://doi.org/10.1117/12.2076534

KEYWORDS: Antennas, Silicon, Modulation, Polymers, Modulators, Waveguides, Sensors, Electromagnetism, Electric field sensors, Plasmonics

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The detection and measurement of electromagnetic fields have attracted significant amounts of attention in recent years. Traditional electronic electromagnetic field sensors use large active conductive probes which perturb the field to be measured and also make the devices bulky. In order to address these problems, integrated photonic electromagnetic field sensors have been developed, in which an optical signal is modulated by an RF signal collected by a miniaturized antenna. In this work, we design, fabricate and characterize a compact, broadband and highly sensitive integrated photonic electromagnetic field sensor based on a silicon-organic hybrid modulator driven by a bowtie antenna. The large electro-optic (EO) coefficient of organic polymer, the slow-light effects in the silicon slot photonic crystal waveguide (PCW), and the broadband field enhancement provided by the bowtie antenna, are all combined to enhance the interaction of microwaves and optical waves, enabling a high EO modulation efficiency and thus a high sensitivity. The modulator is experimentally demonstrated with a record-high effective in-device EO modulation efficiency of r₃₃=1230pm/V. Modulation response up to 40GHz is measured, with a 3-dB bandwidth of 11GHz. The slot PCW has an interaction length of 300μm, and the bowtie antenna has an area smaller than 1cm². The bowtie antenna in the device is experimentally demonstrated to have a broadband characteristics with a central resonance frequency of 10GHz, as well as a large beam width which enables the detection of electromagnetic waves from a large range of incident angles. The sensor is experimentally demonstrated with a minimum detectable electromagnetic power density of 8.4mW/m² at 8.4GHz, corresponding to a minimum detectable electric field of 2.5V/m and an ultra-high sensitivity of 0.000027V/m Hz^-1/2 ever demonstrated. To the best of our knowledge, this is the first silicon-organic hybrid device and also the first PCW device used for the photonic detection of electromagnetic waves. Finally, we propose some future work, including a Teraherz wave sensor based on antenna-coupled electrooptic polymer filled plasmonic slot waveguide, as well as a fully packaged and tailgated device.

Proceedings Article | 14 March 2015 Paper

Integrated broadband bowtie antenna on transparent substrate

Xingyu Zhang, Shiyi Wang, Harish Subbaraman, Qiwen Zhan, Zeyu Pan, Chi-jui Chung, Hai Yan, Ray Chen

Proceedings Volume 9362, 93620P (2015) https://doi.org/10.1117/12.2076536

KEYWORDS: Antennas, Glasses, Gold, Electromagnetic radiation, Microwave radiation, Silicon, Wireless communications, Electromagnetism, Plasmonics, Computer simulations

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Proceedings Article | 13 March 2015 Paper

Low-loss mode converter for coupling light into slotted photonic crystal waveguide

Xingyu Zhang, Harish Subbaraman, Amir Hosseini, Zeyu Pan, Hai Yan, Chi-jui Chung, Ray Chen

Proceedings Volume 9368, 936807 (2015) https://doi.org/10.1117/12.2076499

KEYWORDS: Waveguides, Polymers, Photonic crystals, Silicon, Data conversion, Interfaces, Cladding, Waveguide modes, Scanning electron microscopy, Optical interconnects

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Showing 5 of 17 publications

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