Article
Optics
Nathan Dostart, Hayk Gevorgyan, Deniz Onural, Milos A. Popovic
Summary: The study demonstrates a non-reciprocal element made up of a pair of microring modulators and a microring phase shifter in an active silicon photonic process, achieving an on-chip isolator. Isolation of up to 13 dB was achieved with an insertion loss of 18 dB. The design, along with increased modulation efficiency, could potentially make modulator-based isolators a standard 'black-box' component in integrated photonics CMOS foundry platform component libraries.
Article
Optics
Chi Xu, William E. Hayenga, Demetrios N. Christodoulides, Mercedeh Khajavikhan, Patrick LiKamWa
Summary: We demonstrate how the gain-loss contrast between two coupled identical resonators can be utilized to enhance the modulation frequency response of laser diodes. By adjusting the ratio of injection current levels, significant bandwidth improvement is achieved, up to 1.63 times the fundamental resonant frequency of individual devices.
Article
Chemistry, Multidisciplinary
Huan Zhang, Xiaoqing Lv, Beiju Huang, Chuantong Cheng, Zan Zhang, Zanyun Zhang, Weihao Fang, Hengjie Zhang, Run Chen, Yulong Huang, Hongda Chen
Summary: An optical biosensor reuse method using a nanoscale parylene C film was proposed, demonstrating successful detection of CEA. The method simplifies the antibody modification process of sensors and verifies the repeatability and reliability of sensor reuse.
Article
Optics
Weiqing Cheng, Xiao Sun, Shengwei Ye, Bocheng Yuan, Yiming Sun, John h. Marsh, Lianping Hou
Summary: In this work, a novel side wall grating slot microring resonator (SG-SMRR) based on the silicon on-insulator (SOI) platform is proposed and experimentally demonstrated. The SG-SMRR shows high refractive index and concentration sensitivities, as well as a significantly enlarged detection range compared to conventional SMRRs.
Article
Optics
Cheng Zhang, Jin Wang, Guoguo Kang, Jianxin Gao, Zhier Qu, Shuai Wan, Chunhua Dong, Yijie Pan, Jifeng Qu
Summary: This article proposes the use of Whispering gallery mode resonators (WGMRs) in a high-resolution and wide-range temperature sensor. By utilizing a Si3N4 ring resonator as the sensing element and a MgF2-based microcomb as a frequency reference, the sensor achieved an ultra-high resolution of 58 micro-Kelvin (mu K). An ambiguity-resolving method based on the gradient of feedback voltage and frequency-locking technique were combined to ensure high resolution and broad range simultaneously.
PHOTONICS RESEARCH
(2023)
Article
Optics
Zhiyong Li, Cheng Hou, Ye Luo, Wei Zhang, Lan Li, Peipeng Xu, Tiefeng Xu
Summary: In this article, a compact racetrack double microring resonator (MRR) sensor based on Ge28Sb12Se60 (GeSbSe) is investigated. The sensor device consists of a racetrack microring, an embedded small microring, and a strip waveguide. The compact racetrack double MRR device is obtained with a Q-factor of 7.17 x 10(4) and an FSR of 24 nm by measuring the transmission spectrum. By measuring different concentrations of glucose solutions, a sensitivity of 297 nm/RIU and an intrinsic limit of detection (iLOD) of 7.40 x 10(-5) are obtained. It paves the way for the application of chalcogenide glasses in the field of biosensing.
Article
Optics
Zhiyong Li, Cheng Hou, Ye Luo, Wei Zhang, Lan Li, Peipeng Xu, Tiefeng Xu
Summary: This article investigates a compact racetrack double microring resonator (MRR) sensor based on Ge28Sb12Se60 (GeSbSe). The sensor device consists of a racetrack microring, an embedded small microring, and a strip waveguide, fabricated using electron beam lithography (EBL) and dry etching. The compact racetrack double MRR device is obtained with a Q-factor equal to 7.17 x 10^4 and FSR of 24 nm by measuring the transmission spectrum. Sensitivity of 297 nm/RIU by linear fitting and an intrinsic limit of detection (iLOD) of 7.40 x 10^-5 are obtained by measuring different concentrations of glucose solutions. It paves the way for the application of chalcogenide glasses in the field of biosensing.
Article
Engineering, Electrical & Electronic
Mengyuan Ye, Yunlong Li, Weilun Zhang, Li Liu, Yang Shi, Yu Yu
Summary: A multi-mode transmitter based on cascaded silicon microring modulators (MRMs) is proposed and demonstrated in this paper. By achieving data modulation and mode multiplexing simultaneously, it simplifies the layout and reduces size. The experimental results show good transmission performance for non-return-to-zero on-off keying (NRZ-OOK) signals with a bit rate of 2 x 25 Gbps.
IEEE PHOTONICS JOURNAL
(2022)
Article
Physics, Applied
Saawan K. Bag, Rajat K. Sinha, Meher Wan, S. K. Varshney
Summary: This study presents an integrated photonic platform for detecting single nanoparticles, capable of distinguishing between different sizes and quantities of nanoparticles, and has the potential to detect single nanoparticles of infinitesimally small size.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Optics
David W. U. Chan, Xiong Wu, Chao Lu, Alan Pak Tao Lau, Hon Ki Tsang
Summary: We propose a high-efficiency silicon microring modulator for next-generation optical transmitters operating at line rates above 300 Gb/s. The modulator supports high-order PAM-8 modulation up to 110 Gbaud (330 Gb/s) with a driving voltage of 1.8 V-pp. The dynamic energy consumption of the modulator is 3.1 fJ/bit, thanks to its small driving voltage and device capacitance. Comparing PAM-8 with ultrahigh baud rate PAM-4 of up to 130 Gbaud (260 Gb/s), we demonstrate that PAM-8 is better suited for 300-Gb/s lane rate operation in bandwidth-constrained short-reach systems.
Correction
Optics
Xuelei Zhang, Chenfeng Zhou, Ye Luo, Zhen Yang, Wei Zhang, Lan Li, Peipeng Xu, Peiqing Zhang, Tiefeng Xu
Summary: This passage corrects an error in [Opt. Express 30, 3866 (2022)], Fig. 6(c), stating that the vertical axis should be in arbitrary units instead of dB. All the conclusions remain unchanged after the correction.
Article
Physics, Multidisciplinary
Chao Wu, Qilin Zheng, Yingwen Liu, Yang Wang, Jiangfang Ding, Pingyu Zhu, Shichuan Xue, Miaomiao Yu, Weihong Luo, Kaikai Zhang, Anqi Huang, Mingtang Deng, Junjie Wu, Ping Xu
Summary: In this study, a reconfigurable ring resonator with tunable quality factors was proposed and demonstrated to efficiently increase the dimensionality of frequency entanglement. The method utilized an asymmetric Mach-Zehnder interferometer to modulate the quality factor, resulting in a significant increase in Schmidt number and CAR while maintaining a high pair generation rate. This approach is widely applicable to other material-based ring resonators and can serve as a general solution for high-dimensional quantum frequency combs.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Optics
Jianfeng Xiong, Jian Tang, Ming Chen, Tianrang Wang, Yu Cheng, Hui Wen
Summary: A temperature insensitive microring resonator with double-layer U-shaped waveguide is proposed for sensing applications. The unique structure of the resonator enhances the interaction between light and matter, and the correct selection of parameters allows for low temperature dependence in aqueous solution. The device shows a sensitivity of 496 nm/RIU +/- 5 pm/K and has potential applications in refractive index measurement and real-time monitoring.
Article
Polymer Science
Xihan Wu, Jiajun Wang, Jiachen Han, Yuqi Xie, Xuyang Ge, Jianzhi Liao, Yunji Yi
Summary: This article explores the application of the polymer nanocomposite IOC-133 in refractive index sensing. A suspended slot waveguide structure is proposed to combine with the high refractive index polymer nanocomposites, addressing the issue of decreasing sensitivity caused by residual layers. The proposed suspended slot microring sensor achieves a high sensitivity of 436 nm/RIU, six times higher than the microring sensor with a ridge waveguide.
Article
Engineering, Multidisciplinary
Hatem Besbes, Faouzi Ouerghui, Mohamed Omri, Shyqyri Haxha, Fathi AbdelMalek
Summary: A biosensor based on miniature gold rings was developed for detecting avian influenza viruses. The design of the microring resonator allows for great sensitivity in detecting various viruses, including H1N1 and H9N2. The use of two-dimensional black phosphorus materials further enhances the sensitivity for detecting H9N2.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Neurosciences
Wesley D. Sacher, Fu-Der Chen, Homeira Moradi-Chameh, Xianshu Luo, Anton Fomenko, Prajay T. Shah, Thomas Lordello, Xinyu Liu, Ilan Felts Almog, John N. Straguzzi, Trevor M. Fowler, Youngho Jung, Ting Hu, Junho Jeong, Andres M. Lozano, Patrick Guo-Qiang Lo, Taufik A. Valiante, Laurent C. Moreaux, Joyce K. S. Poon, Michael L. Roukes
Summary: This study demonstrates the use of implantable photonic neural probes to overcome the limitations of traditional light-sheet microscopes for imaging non-transparent brain tissues. These probes can generate planar patterned illumination in brain tissues without additional micro-optic components. The new neural probes pave the way for new variants of LSFM for deep brain imaging and experiments in freely moving animals.
Article
Optics
Yiding Lin, Jason C. C. Mak, Hong Chen, Xin Mu, Andrei Stalmashonak, Youngho Jung, Xianshu Luo, Patrick G-Q Lo, Wesley D. Sacher, Joyce K. S. Poon
Summary: This study demonstrates a bi-layer silicon nitride edge coupler that achieves low-loss coupling with fibers over a broad optical wavelength range. By gradually transferring input light into high-confinement single-mode waveguides, this design enables efficient routing while maintaining a minimum lithographic feature size. The fiber-to-chip coupling loss of this design is significantly lower (about 3 to 5 dB) compared to single-layer designs with similar waveguide confinement and feature size limitations.
Article
Optics
Zheng Yong, Hong Chen, Xianshu Luo, Alperen Govdeli, Hongyao Chua, Saeed S. Azadeh, Andrei Stalmashonak, Guo-Qiang Lo, Joyce K. S. Poon, Wesley D. Sacher
Summary: We present power-efficient silicon nitride waveguide phase shifters for blue, green, and yellow wavelengths. These phase shifters have low power consumption due to a suspended structure and multi-pass waveguide design. Fabricated on 200-mm silicon wafers using deep ultraviolet lithography, these devices are part of an active visible-light integrated photonics platform. The average power consumption to achieve a n phase shift is measured to be 0.78, 0.93, 1.09, and 1.20 mW at wavelengths of 445, 488, 532, and 561 nm, respectively. These phase shifters are integrated into Mach-Zehnder interferometer switches with rise (fall) times of approximately 570 (590) μs.
Article
Optics
Wesley D. Sacher, Fu-Der Chen, Homeira Moradi-Chameh, Xinyu Liu, Ilan Felts Almog, Thomas Lordello, Michael Chang, Azadeh Naderian, Trevor M. Fowler, Eran Segev, Tianyuan Xue, Sara Mahallati, Taufik A. Valiante, Laurent C. Moreaux, Joyce K. S. Poon, Michael L. Roukes
Summary: This article introduces implantable silicon neural probes with integrated optical phased arrays and demonstrates optical beam steering in vitro. The formation of beams in brain tissue is simulated and characterized, and the probes are used for optogenetic stimulation and calcium imaging.
Article
Optics
Saeed Sharif Azadeh, Andrei Stalmashonak, Kevin W. Bennett, Fu-Der Chen, Wesley D. Sacher, Joyce K. S. Poon
Summary: This study reports multicore fibers with 10 and 16 linearly distributed cores that can operate in single mode in the visible spectrum. These fibers have low propagation loss and inter-core crosstalk, making them suitable for spatial division multiplexing in the visible spectrum.
Article
Nanoscience & Nanotechnology
Youngho Jung, Hyeon Han, Ankita Sharma, Junho Jeong, Stuart S. P. Parkin, Joyce K. S. Poon
Summary: Vanadium dioxide (VO2) is a material with phase transition characteristics that can be used in hybrid photonic integrated devices. By utilizing the phase transition properties of VO2, a compact optical memory element has been integrated into a silicon waveguide. This method allows for low-energy optical data storage in silicon photonic integrated circuits.
Editorial Material
Engineering, Electrical & Electronic
Patrick Lo Guo-Qiang, Juejun Hu, Luo Xian-Shu, Joyce Poon, Dries Van Thourhout, Fengnian Xia
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Multidisciplinary Sciences
Yiding Lin, Zheng Yong, Xianshu Luo, Saeed Sharif Azadeh, Jared C. Mikkelsen, Ankita Sharma, Hong Chen, Jason C. C. Mak, Patrick Guo-Qiang Lo, Wesley D. Sacher, Joyce K. S. Poon
Summary: Visible and near-infrared spectrum photonic integrated circuits are important technologies for addressing scaling challenges in quantum information and biosensing. This study reports the integration of silicon nitride-on-silicon waveguide photodetectors in a visible light photonic platform, which achieved high external quantum efficiency, wide opto-electronic bandwidth, and high avalanche gain-bandwidth product.
NATURE COMMUNICATIONS
(2022)
Article
Biophysics
Jianfeng Li, Armin Reimers, Ka My Dang, Michael G. K. Brunk, Jonas Drewes, Ulrike M. Hirsch, Christian Willems, Christian E. H. Schmelzer, Thomas Groth, Ali Shaygan Nia, Xinliang Feng, Rainer Adelung, Wesley D. Sacher, Fabian Schuett, Joyce K. S. Poon
Summary: Engineered neural tissues can be used to study neurological conditions and drug screening. This study demonstrates the integration of optical dopamine sensors into three-dimensional tissue cultures, providing a way to monitor neurochemical concentrations in real time.
BIOSENSORS & BIOELECTRONICS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
S. Menezo, Z. Yong, K. Froberger, T. Thiessen, J. C. C. Mak, F. Denis-le Coarer, M. Peyrou, L. Milord, J. Da Fonseca, C. Jany, P. Grosse, F. Mazur, J. K. S. Poon
Summary: In this work, we present a silicon IQ modulator that is integrated with a III-V/Si semiconductor optical amplifier (SOA) at the output. We demonstrate the successful operation of 40GBaud PAM4 using one of the Mach Zehnder modulators with an SOA gain of 10dB.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Yiding Lin, Jason C. C. Mak, Hong Chen, Xin Mu, Andrei Stalmashonak, Youngho Jung, Xianshu Luo, Patrick G-Q Lo, Wesley D. Sacher, Joyce K. S. Poon
Summary: A novel low-loss silicon nitride bi-layer fiber-to-chip edge coupler was reported on 200-mm silicon wafers for visible spectrum photonic circuits, achieving minimum per-facet coupling loss around 2.6dB at lambda=488nm (TM) and polarization-independent coupling with around 3.2-dB loss.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Yiding Lin, Zheng Yong, Xianshu Luo, Patrick G-Q Lo, Wesley D. Sacher, Joyce K. S. Poon
Summary: The study presents silicon nitride waveguide-integrated silicon lateral p-i-n photodiodes with high responsivity and external quantum efficiency.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Saeed Sharif Azadeh, Andrei Stalmashonak, Kevin W. Bennett, Fu-Der Chen, Wesley D. Sachet, Joyce K. S. Poon
Summary: The study demonstrates 10- and 16-core multicore fibers operating in single mode with minimal loss in the visible spectrum. These fibers are designed for emerging applications that require spatial division multiplexing in the visible spectrum.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Fu-Der Chen, Youngho Jung, Tianyuan Xue, Jason C. C. Mak, Xianshu Luo, Patrick Guo-Qiang Lo, Michael L. Roukes, Joyce K. S. Poon, Wesley D. Sacher
Summary: The study demonstrates implantable neural probes with integrated silicon nitride optical phased arrays on 200mm wafers for wavelengths near 480nm, enabling emission of a single steerable beam.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Proceedings Paper
Engineering, Biomedical
Hannes Wahn, Alec Xu, Joyce K. S. Poon, Wesley D. Sacher
Summary: The research significantly reduced image reconstruction time in light field microscopy by applying an unmatched back projector based deconvolution algorithm, and used 3D laser written microstructures to characterize the light field imaging.
ADVANCES IN MICROSCOPIC IMAGING III
(2021)
