Article
Nanoscience & Nanotechnology
Xiaoyi She, Qiankun Yao, Qiushun Zou, Guowei Yang, Yang Shen, Chongjun Jin
Summary: In this article, a visual, ultrasensitive, optical hydrogen sensor based on a tunable Fabry-Perot resonator is introduced, which can convert the volume expansion of palladium during hydrogenation into an optical signal and enable visual detection of hydrogen. The experimental results show a giant spectral shift of 279 nm when exposed to 0.6% hydrogen, indicating the excellent potential of this sensor for hydrogen sensing applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Bin Xu, Qingtian Zhao, Xiudong Duan, Tianye Huang, Chaolong Song, Xin Tu
Summary: An optofluidic sensor, consisting of a fiber Fabry-Perot interferometer and a microfluidic chip, is demonstrated to measure aerostatic pressure, local temperature, and fluidic flow rate in microfluidic chips. The aerostatic pressure sensitivity is as high as -2393.3 nm/Bar. By demodulating the aerostatic pressure and temperature with a sensitivity matrix, both the physical parameters can be predicted simultaneously. The optofluidic sensor based on the optical fiber Fabry-Perot interferometer provides a promising cost-effective sensing platform for monitoring multiple physical parameters in microfluidic chips and is of great significance for on-chip biochemical reactions.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Taehyun Kim, Jongsu Lee, Eui-Sang Yu, Seungha Lee, Hyeonbin Woo, Jeonghun Kwak, Seok Chung, Inhee Choi, Yong-Sang Ryu
Summary: This article introduces the structure and characteristics of the Fabry-Perot (FP) resonator, and demonstrates the tuning of surface-enhanced Raman scattering (SERS) enhancement factor (EF) using a metal-dielectric-metal structure. Computational and experimental analyses investigate the near-field EF of randomly dispersed gold nano-gaps and the far-field SERS EF modulation by varying the optical resonance of the FP etalon. The study highlights the importance of wavelength matching between FP resonance and excitation/scattering wavelengths in determining the magnitude of the SERS EF. Finally, a tunable SERS platform with a controlled dielectric cavity is proposed, and its dynamic SERS switching performance is validated through information encryption via liquid immersion.
Proceedings Paper
Engineering, Electrical & Electronic
Abdelrahman Toraya, Noha Gaber, Frederic Marty, Tarik Bourouina
Summary: A novel design of optical resonators on-chip is introduced in this work, utilizing straight mirrors combined with an upright cylindrical lens to overcome the limitation of curved mirrors and achieve a wider sensing range. The design is verified by numerical simulations, addressing the issue of higher order resonance modes caused by curved mirrors.
MOEMS AND MINIATURIZED SYSTEMS XX
(2021)
Article
Engineering, Electrical & Electronic
Rodolfo Martinez-Manuel, Jonathan Esquivel-Hernandez, Sophie LaRochelle
Summary: A novel method is presented to reduce the nonlinearity effect of a wavelength scanning diode laser in a low-reflectivity Fabry-Perot interferometer. The proposed method improves system resolution and achieves a temperature insensitive sensing system. It is demonstrated by measuring the thermo-optic coefficient of liquid samples and presenting long-term performance experimental results.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Analytical
Xianjun Sheng, Xiaolong Lu, Ning Liu, Yunhong Liu
Summary: This paper proposes a broadband high-gain Fabry-Perot (F-P) antenna composed of an air-loaded slot-coupled broadband microstrip antenna and a frequency selective surface (FSS) based positive gradient reflection phase structure. The gain enhancement is achieved by the superposition effect of multiple reflections and transmissions. By cascading the single-layer FSS and dielectric substrate, a positive gradient reflection phase over a wider frequency range is achieved. Simulated and experimental results demonstrate the effectiveness of the design.
Article
Optics
Carlos Saavedra, Deepak Pandey, Wolfgang Alt, Hannes Pfeifer, Dieter Meschede
Summary: The study introduces three high finesse tunable monolithic fiber Fabry-Perot cavities with high passive mechanical stability, suitable for various applications such as cavity-based sensing techniques, optical filters, and quantum light-matter interfaces. The devices demonstrate stable locking of cavity resonance with sub-Hertz feedback bandwidths and suppression of root-mean-square frequency fluctuations to approximately 2% of the cavity linewidth. The frequency noise in a wide range is mainly limited by the thermal noise of the system's mechanical resonances.
Article
Nanoscience & Nanotechnology
Kanghee Lee, Junho Park, Seojoo Lee, Soojeong Baek, Jagang Park, Fabian Rotermund, Bumki Min
Summary: This study demonstrates the resonance-enhanced spectral funneling of light coupled to a Fabry-Perot resonator with a temporal boundary mirror. By abruptly changing the mirror reflectance and quality factor, the spectral contents of the input light are redistributed. This technique has potential applications in the development of efficient mechanically tunable narrowband terahertz sources.
Article
Optics
Shijie Zhang, Qi Wang, Xufeng Gao, Ruijin Hong, Dawei Zhang
Summary: This study proposes a bidirectional dynamic tunable absorber based on a thin film dielectric-metal multilayer structure, which exhibits excellent absorption performance in the near-infrared range. The narrowband absorption can be dynamically tuned via PDLC modulation, and the angular and polarization tolerances of both narrowband and broadband absorptions are demonstrated.
OPTICS COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Paul C. V. Thrane, Chao Meng, Fei Ding, Sergey I. Bozhevolnyi
Summary: Tunable metasurfaces combined with microelectromechanical systems (MEMS) and gap-surface plasmon (GSP) offer high modulation efficiency, broadband operation, and fast response. A comparison between tunable metasurfaces operating in GSP and Fabry-Perot (FP) regions shows that GSP region provides larger operation bandwidth, while FP region offers relaxed assembly requirements and operation tolerances.
Article
Engineering, Electrical & Electronic
Hongfei Liu, Pingsheng Zhang, Yuxiu Zhou, Xin-Hua Deng, Jiren Yuan
Summary: This paper presents a graphene-based THz absorber that achieves multichannel perfect absorption using Fabry Perot resonance. The absorber is polarization-insensitive and tolerant to a wide range of incident angles. The number of absorption bands can be controlled by adjusting the thickness of the dielectric spacer. Additionally, the absorber exhibits stability to magnetic fields, circularly polarized light, and environmental refractive index changes.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Review
Optics
Hui Hao, Hao Lin, Junbao Chen, Wei Xia, Dongmei Guo, Ming Wang
Summary: A enhanced laser self-mixing interferometry based on a tunable Fabry-Perot Filter is proposed in this paper, which offers a signal strength about 40 times stronger than conventional self-mixing interferometry. This approach can improve signal-to-noise ratio and extend the applicability of self-mixing interferometry into new fields, overcoming the spectral range limitation of some optical edge filtering methods. The wavelength of the Fabry-Perot Filter can be adjusted to match different lasers for an enhanced self-mixing interferometry signal.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Physics, Applied
Weihao Liu, Liwen Zhang, Zijia Yu, Yucheng Liu, Weiwei Li, Qika Jia, Baogen Sun, Hongliang Xu, Wenxin Liu
Summary: Fabry-Perot (FP) resonators with metallic subwavelength grooves or holes, traditionally used in the optical region, have recently gained interest for terahertz wave generation and manipulation. A new type of terahertz FP resonator formed by a cluster of coupled grooves has higher energy capacity, quality factor, and is easier to fabricate compared to traditional single groove resonators. Using free-electron beams to excite an array of these FP resonators allows for coherent terahertz emission, offering a promising method for high-power and coherent terahertz wave generation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Ceramics
Luyi Zheng, Shiyu Zhang, Qi Yao, Kai Lin, Aiguo Rao, Chunhui Niu, Mingqing Yang, Lei Wang, Yong Lv
Summary: This study utilized a broadband absorption Fabry-Perot cavity structure to actively modulate the optical response and successfully obtained different spectral colors such as red, orange, yellow, green, blue, and violet. The electrochromic device has the advantages of high brightness, high saturation, low cost, and low power consumption, providing a new option for designing full-color reflective displays in the future.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Zhongcan Chang, Zhixiang Luo, Shiyi Cao, Kui Ouyang, Keting Ge, Zhujun Wan
Summary: This article demonstrates narrow-band tunable optical filters based on three cascaded Fabry-Perot cavities. The cavities are made of a transparent electro-optic ceramic material. By utilizing a reflective design, the optical signal passes through the three cavities twice, allowing for a more tolerant structure to loss. Two types of tunable optical filters are fabricated for different applications.
Article
Chemistry, Multidisciplinary
Yuzhi Shi, Lei-Ming Zhou, Ai Qun Liu, Manuel Nieto-Vesperinas, Tongtong Zhu, Amir Hassanfiroozi, Jingquan Liu, Hui Zhang, Din Ping Tsai, Hang Li, Weiqiang Ding, Weiming Zhu, Ye Feng Yu, Alfredo Mazzulla, Gabriella Cipparrone, Pin Chieh Wu, C. T. Chan, Cheng-Wei Qiu
Summary: This study reveals the emergence of superhybrid modes with magnetic multipoles and electric toroidal moments, excited by linearly polarized beams, leading to giant positive and negative optical torques on Mie-resonant particles. These giant and reversed torques are observed for the first time in the scattering spectrum, opening up a new avenue for exploring metaoptics and optical manipulations.
Article
Optics
Yuzhi Shi, Yongfeng Wu, Lip Ket Chin, Zhenyu Li, Jingquan Liu, Mu Ku Chen, Shubo Wang, Yi Zhang, Patricia Yang Liu, Xiaohong Zhou, Hong Cai, Wanzhen Jin, Yefeng Yu, Ruozhen Yu, Wei Huang, Peng Huat Yap, Limin Xiao, Wee Ser, Thi Thanh Binh Nguyen, Yu-Tsung Lin, Pin Chieh Wu, Jiayan Liao, Fan Wang, C. T. Chan, Yuri Kivshar, Din Ping Tsai, Ai Qun Liu
Summary: This study demonstrates a multifunctional virus manipulation technique that enables efficient trapping and manipulation of arbitrary number of viruses. Enhanced optical forces are produced by fine tuning of interference resonances in engineered arrays of nanocavities, allowing trapping and manipulation of viruses as small as 40 nm. This technique opens up new opportunities for studying virus pathogenesis and inhibitor development.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Hannah M. Peterson, Lip Ket Chin, Yoshi Iwamoto, Juhyun Oh, Jonathan C. T. Carlson, Hakho Lee, Hyungsoon Im, Ralph Weissleder
Summary: This study developed a new cellular analyzer that allows high-dimensional analysis of directly harvested cells within the same day. By combining different techniques, comprehensive analysis of breast cancer samples is possible, providing a rapid, robust, and low-cost solution.
Article
Multidisciplinary Sciences
Hui Zhang, Lingxiao Wan, Tobias Haug, Wai-Keong Mok, Stefano Paesani, Yuzhi Shi, Hong Cai, Lip Ket Chin, Muhammad Faeyz Karim, Limin Xiao, Xianshu Luo, Feng Gao, Bin Dong, Syed Assad, M. S. Kim, Anthony Laing, Leong Chuan Kwek, Ai Qun Liu
Summary: This paper proposes an approach to reduce the resource costs for quantum teleportation of subspaces in high-dimensional systems using quantum autoencoders and demonstrates it experimentally on an integrated photonic platform. By training the on-chip autoencoder with unsupervised machine learning, compression and teleportation of any state from a high-dimensional subspace are achieved.
Article
Optics
Hui Zhang, Jonathan Wei Zhong Lau, Lingxiao Wan, Liang Shi, Yuzhi Shi, Hong Cai, Xianshu Luo, Guo-Qiang Lo, Chee-Kong Lee, Leong Chuan Kwek, Ai Qun Liu
Summary: This study demonstrates the capability of photonic neural networks in predicting the quantum mechanical properties of molecules and shows that multiple properties can be learned simultaneously in a photonic chip through a multi-task regression learning algorithm. It is the first application of photonics technology in machine learning for computational chemistry and molecular sciences, such as drug discovery and materials design, which is of great significance.
LASER & PHOTONICS REVIEWS
(2023)
Article
Multidisciplinary Sciences
Haoye Qin, Yuzhi Shi, Zengping Su, Guodan Wei, Zhanshan Wang, Xinbin Cheng, Ai Qun Liu, Patrice Genevet, Qinghua Song
Summary: Polarization singularities and topological vortices are observed in photonic crystal slabs centered at bound states in the continuum (BICs), which can be attributed to zero amplitude of polarization vectors. Optical forces around BICs exhibit similar topological features, with force vectors winding in the momentum space. These topological forces can be used to trap and repel nanoparticles, providing opportunities for manipulating nanoparticles and fluid flow.
Article
Multidisciplinary Sciences
Yuzhi Shi, Tongtong Zhu, Jingquan Liu, Din Ping Tsai, Hui Zhang, Shubo Wang, Che Ting Chan, Pin Chieh Wu, Anatoly V. Zayats, Franco Nori, Ai Qun Liu
Summary: This study theoretically and experimentally reveals the dominant role of the spin angular momentum (SAM) in generating optical lateral forces (OLF) on nonabsorbing particles, while absorbing particles are affected by the spin-orbit interaction. The experimental results demonstrate the dependence of the force's amplitude and sign on polarization.
Article
Chemistry, Multidisciplinary
Lip Ket Chin, Jun-Yeong Yang, Benjamin Chousterman, Sunghoon Jung, Do-Geun Kim, Dong-Ho Kim, Seunghun Lee, Cesar M. Castro, Ralph Weissleder, Sung-Gyu Park, Hyungsoon Im
Summary: In this study, an ultrasensitive multiplexed plasmonic sensing technology was developed for rapid quantification of multiple biomarkers in point-of-care settings, which could improve the diagnosis and management of sepsis. The technology integrated chemifluorescence signal enhancement with plasmon-enhanced fluorescence detection, allowing for rapid analysis of cytokine biomarkers with high sensitivity. A plasmonic sensing chip based on nanoparticle-spiked gold nanodimple structures was also developed for direct detection of cytokines in clinical plasma samples.
Article
Optics
Cong Xiong, Wei Jiang, Caoyuan Wang, Ruowei Yu, Jun He, Runxiao Chen, Xuan Li, Kang Ying, Haiwen Cai, Aiqun Liu, Limin Xiao
Summary: The nanobore fiber (NBF) is a promising nanoscale optofluidic platform with long nanochannels and unique optical properties. In this study, NBF-based fiber Bragg gratings (FBGs) were introduced using femtosecond (fs) laser direct writing or ultraviolet (UV) laser phase mask techniques for the first time. The optimized UV laser fabricated FBG achieved a high reflectivity of 96.89% while preserving the open nanochannel. The NBF-based FBGs showed high potential for nanofluidic applications.
Article
Chemistry, Multidisciplinary
Ahmed A. Elsayed, Ahmed M. Othman, Yasser M. Sabry, Frederic Marty, Haitham Omran, Diaa Khalil, Ai-Qun Liu, Tarik Bourouina
Summary: In Raman analysis, the substrate material can enhance or interfere with the signal depending on its properties. By tilting the supporting substrate, the Raman signal of the substrate material, in this case, silicon, can be drastically reduced, making it easier to observe the target analyte, such as microplastic particles.
Review
Optics
Wei Luo, Lin Cao, Yuzhi Shi, Lingxiao Wan, Hui Zhang, Shuyi Li, Guanyu Chen, Yuan Li, Sijin Li, Yunxiang Wang, Shihai Sun, Muhammad Faeyz Karim, Hong Cai, Leong Chuan Kwek, Ai Qun Liu
Summary: Recent years have seen significant progress in quantum communication and quantum internet through the use of quantum photonic chips, which offer scalability, stability, and low cost in a compact form. This article provides an overview of the advancements in quantum photonic chips for quantum communication, including the main fabrication platforms and key components. It discusses various applications such as quantum key distribution and quantum teleportation. The article also highlights the challenges for achieving high-performance chip-based quantum communication and provides insights into future opportunities for integrated quantum networks.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Yuan Shen, Wai-Keong Mok, Changsuk Noh, Ai Qun Liu, Leong-Chuan Kwek, Weijun Fan, Andy Chia
Summary: This article proposes a new approach to quantum synchronization by using an approximate model of the Duffing-van der Pol oscillator. It captures interesting phenomena in the deep-quantum strongly nonlinear regime, such as amplitude death on resonance and nonlinearity-induced position correlations.
Proceedings Paper
Engineering, Electrical & Electronic
Yuxing Chen, Cong Xiong, Jie Zhu, Caoyuan Wang, Ruowei Yu, Hanbing Yue, Zhende Zhai, Yuzhi Shi, Aiqun Liu, Limin Xiao
Summary: This study demonstrates the fabrication of an all-solid light-induced self-writing waveguide using photopolymer material, which provides a new scheme for interconnecting optical fibers and can potentially be extended to fiber-waveguide interconnection and photonic chip integration.
2022 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE, ACP
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Hui Zhang, Ai Qun Liu
Summary: This article introduces the advantages of optical neural networks and complex-valued neural networks over their electronic and real-valued counterparts, respectively. It proposes an optical neural network that implements complex-valued neural networks and presents an efficient on-chip training protocol applicable for various types of chip structures. The results demonstrate the potential for smaller chip size, stronger performance, and flexible reconfiguration in realistic applications.
2022 PHOTONICS & ELECTROMAGNETICS RESEARCH SYMPOSIUM (PIERS 2022)
(2022)
Review
Optics
Guanyu Chen, Nanxi Li, Jun Da Ng, Hong-Lin Lin, Yanyan Zhou, Yuan Hsing Fu, Lennon Yao Ting Lee, Yu Yu, Ai-Qun Liu, Aaron J. Danner
Summary: Lithium niobate (LN) has undergone significant developments due to its versatile properties, particularly its large electro-optic coefficient. The availability of high-quality thin-film LN on insulator (LNOI) has paved the way for integrated LN photonics, enabling the demonstration of various high-performance devices. This review provides a comprehensive summary of advances in LN photonics, including both bulk LN devices and recently developed thin-film LN devices.
ADVANCED PHOTONICS
(2022)
