Article
Engineering, Electrical & Electronic
Takemasa Tamanuki, Hiroyuki Ito, Toshihiko Baba
Summary: This study focuses on an optical beam scanning device utilizing photonic crystal slow-light waveguides and switch trees, operated through thermo-optic tuning at a fixed wavelength. With a custom prism lens for beam collimation, the device achieved two-dimensional scanning with a small divergence angle and low power consumption.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Jianwei Chen, Ran Hao, Ibrahim Nasidi, Huangjie Zhang, Xilan Wang, Shangzhong Jin
Summary: In this study, an ultrafast solution based on a tandem classification regression neural network is proposed to solve the design difficulties of photonic crystal waveguides (PCWs) and realize instant prediction of PCW's performances. The network achieves high accuracy with a coefficient of determination of 0.99. Furthermore, the reverse-designed neural network enables the determination of PCW parameters according to desired optical properties. The results could pave the way for future deep learning-based photonic device design towards high-performances.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Luis Torrijos-Moran, Amadeu Griol, Jaime Garcia-Ruperez
Summary: Researchers have demonstrated slow light bimodal interferometric behavior in an integrated single-channel one-dimensional photonic crystal for the first time. This structure supports two electromagnetic modes with a large group velocity difference, resulting in over a 20-fold reduction in higher-order mode group velocity compared to other conventional interferometers. The proposed bimodal photonic crystal interferometer shows significant performance improvement in creating an ultra-compact optical modulator and a highly sensitive photonic sensor.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Optics
Kazuhiro Kuruma, Hironobu Yoshimi, Yasutomo Ota, Ryota Katsumi, Masahiro Kakuda, Yasuhiko Arakawa, Satoshi Iwamoto
Summary: This study reports single-photon sources using single quantum dots embedded in topological slow light waveguides based on valley photonic crystals. The experiment demonstrates Purcell-enhanced single-photon emission in a topological slow light mode with a group index over 20, showing robust propagation even under sharp bends.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Chirag Murendranath Patil, Guillermo Arregui, Morten Mechlenborg, Xiaoyan Zhou, Hadiseh Alaeian, Pedro David Garcia, Soren Stobbe
Summary: We report optical transmission measurements on suspended silicon photonic-crystal waveguides with a glide symmetry and slow light. The chiral light-matter interaction is strongly enhanced by this combination, but the interplay between slow light and backscattering has not been experimentally investigated in such waveguides. Photonic-crystal resonators consisting of glide-symmetric waveguides terminated by reflectors were built, and transmission measurements and evanescent coupling were used to map out the dispersion relation. The results show excellent agreement with theory and reveal the potential of these waveguides for applications in slow-light devices and chiral quantum optics.
Article
Optics
Keisuke Hirotani, Ryo Shiratori, Toshihiko Baba
Summary: Machine learning was used to model the photonic bands of SiO2-dadded Si lattice-shifted photonic crystal waveguides, leading to the discovery of a structure that can generate low-dispersion slow light with a group index of approximately 20 in the full C-band at telecom wavelengths. The transition structure between this waveguide and a Si-channel waveguide was designed using an evolutional optimization, resulting in a C-band average loss of 0.116 dB/transition. These results suggest the potential for further enhancing the versatility of slow light.
Article
Optics
Hironobu Yoshimi, Takuto Yamaguchi, Ryota Katsumi, Yasutomo Ota, Yasuhiko Arakawa, Satoshi Iwamoto
Summary: Experimental demonstration of topological slow light waveguides in valley photonic crystals, showing more efficient waveguiding in the topological mode compared to the non-topological mode.
Article
Optics
Xiaobin Li, Zhi-yuan Li, Wenyao Liang
Summary: The proposed research presents a tunable topological slow-light state in a photonic crystal waveguide using a unified magnetic field. The waveguide offers a compact structure, high maneuverability, and strong immunity to defects.
Article
Optics
Christian Bohley, Vakhtang Jandieri, Benjamin Schwager, Ramaz Khomeriki, Dominik Schulz, Daniel Erni, Douglas H. Werner, Jamal Berakdar
Summary: The thickness-dependent multimodal nature of three-dimensional coupled photonic crystal waveguides is investigated for the formation of controlled optical gap solitons. Both linear and nonlinear behaviors are studied, revealing the spectral properties and temporal solitons associated with crystal thickness.
Article
Optics
Suna Zhuang, Jianfeng Chen, Wenyao Liang, Zhi-Yuan Li
Summary: The coupling effect of topological photonic states in a double-channel magneto-optical photonic crystal waveguide was studied, revealing both fast and slow light modes with strong robustness against perfect electric conductor defects and close to 100% one-way transmittance.
Review
Engineering, Electrical & Electronic
Anuj Singhal, Igor Paprotny
Summary: This review article discusses the properties and applications of photonic crystals, with a focus on slow-light phenomenon and enhanced sensing for gases and liquids. It also discusses the challenges in fabrication and highlights the importance of high-sensitivity detectors for ubiquitous monitoring.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Guodong Gong, Shuang Gao, Zhuolin Xie, Xiaoyu Ye, Ying Lu, Huali Yang, Xiaojian Zhu, Run-Wei Li
Summary: This research demonstrates a visible light-triggered artificial nociceptor with a simple ITO/CeO2-x/Pt sandwich structure, successfully mimicking the pain-perceptual characteristics of the human visual system, and has significant potential for applications in next-generation intelligent and low-power perceptual systems.
Article
Optics
Shushu Shi, Shan Xiao, Jingnan Yang, Shulun Li, Xin Xie, Jianchen Dang, Longlong Yang, Danjie Dai, Bowen Fu, Sai Yan, Yu Yuan, Rui Zhu, Bei-Bei Li, Zhanchun Zuo, Can Wang, Haiqiao Ni, Zhichuan Niu, Kuijuan Jin, Qihuang Gong, Xiulai Xu
Summary: We report the slow-light enhanced spin-resolved in-plane emission from a single quantum dot (QD) in a photonic crystal waveguide (PCW). The slow light dispersions in PCWs are designed to match the emission wavelengths of single QDs. The resonance between two spin states emitted from a single QD and a slow light mode of a waveguide is investigated under a magnetic field with Faraday configuration. Strongly polarized photon emission enhanced by a slow light mode shows great potential to attain controllable spin-resolved photon sources for integrated optical quantum networks on chip.
Article
Engineering, Electrical & Electronic
Yu Mao, Zhongfu Li, Weipeng Hu, Xiaoyu Dai, Yuanjiang Xiang
Summary: The slow light topological photonic crystal waveguide is an attractive platform for enhancing light-matter interaction. By designing a slow light rainbow trapping structure based on valley photonic crystal waveguides, we can achieve topologically protected edge states at different frequencies and switch between slow light trapped states and transport states by tuning the structural parameter.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Ali Samadian Barough, Mina Noori, Amin Abbasiyan
Summary: A slow light-based refractive index sensor was presented in a 2D hexagonal lattice photonic crystal waveguide by inserting four defect holes. By optimizing the channel width and introducing defects of various sizes, the sensor achieved high sensitivity and detection range. High Q-factor and sensitivity were obtained by tailoring defect radii, showcasing the enhancement of light-matter interaction and sensitivity.
Article
Optics
Yongxi Li, Shengli Pu, Zijian Hao, Shaokang Yan, Yuxiu Zhang, Mahieddine Lahoubi
Summary: A novel vector magnetic field sensor utilizing magnetic fluid response has been proposed, showing high sensitivity in measuring both direction and intensity of magnetic field. Results also demonstrate the feasibility of realizing vector magnetic sensors based on other bending structures in the future.
Article
Engineering, Electrical & Electronic
Khadidja Saker, Mahieddine Lahoubi, Shengli Pu
Summary: Through numerical analysis, it is found that in a magnetic photonic crystal fiber filled with magnetic fluid, the mode conversion efficiency increases and modal birefringence decreases with the increase of magnetic fluid concentration. The fiber filled with 1.75% magnetic fluid concentration shows the best performance in designing magneto-optical isolators.
JOURNAL OF COMPUTATIONAL ELECTRONICS
(2021)
Article
Chemistry, Analytical
Dihui Li, Shengli Pu, Yongxi Li, Min Yuan, Mahieddine Lahoubi
Summary: By utilizing magnetic fluid in a dual-core photonic crystal fiber, a polarization beam splitter capable of separating x and y polarization modes completely has been designed. The device allows for tuning of the working wavelength bandwidth and center wavelength by applying an external magnetic field, making it suitable for operation in the S, C, and L bands.
INSTRUMENTATION SCIENCE & TECHNOLOGY
(2022)
Article
Optics
Zijian Hao, Shengli Pu, Yongxi Li, Dihui Li
Summary: This paper presents a novel vector magnetic field sensor based on an orthogonal optical fiber structure, capable of simultaneous measurement of magnetic field intensity and direction, with experimental verification of the underlying physical principles.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Computer Science, Information Systems
Yuxiu Zhang, Shengli Pu, Yongxi Li, Zijian Hao, Dihui Li, Shaokang Yan, Min Yuan, Chencheng Zhang
Summary: A dual-parameter sensor based on magnetic-fluid-coated nonadiabatic tapered microfiber cascaded with fiber Bragg grating is proposed and demonstrated experimentally. Simultaneous measurement of magnetic field and temperature is achieved by monitoring the interference spectrum and characteristic dip. The sensor shows high sensitivity, easy fabrication, compactness, robustness, and low cost, indicating its extensive application prospect.
Article
Chemistry, Multidisciplinary
Chencheng Zhang, Shengli Pu, Zijian Hao, Boyu Wang, Min Yuan, Yuxiu Zhang
Summary: A novel and compact magnetic field sensor is proposed and experimentally investigated in this study. The sensor consists of a tapered single mode fiber coupled with a nanostructured magnetic fluid-infiltrated photonic crystal fiber, which is easy to fabricate. The response of magnetic fluid to magnetic field is utilized to measure the intensity of magnetic field.
Article
Optics
Zijian Hao, Shengli Pu, Jia Wang, Weinan Liu, Chencheng Zhang, Yuanyuan Fan, Mahieddine Lahoubi
Summary: In this work, an ultracompact reflection-type dual-channel sensor for vector magnetic field and temperature monitoring is proposed. The sensor consists of gold-plated wedge-shaped multimode fiber and gold-plated multimode-no-core fiber as the sensing probes, and utilizes surface plasmon resonance effect to resolve the issue of vector magnetic field and temperature cross-sensitivity. The proposed sensing probes are small in size and have high spatial resolution, making them suitable for narrow space and gradient magnetic field detection.
Article
Chemistry, Physical
Weinan Liu, Shengli Pu, Zijian Hao, Jia Wang, Yuanyuan Fan, Chencheng Zhang, Jingyue Wang
Summary: This study proposed a bent multimode fiber vector magnetic sensor based on surface plasmon resonance. The sensor achieved excitation of surface plasmon mode by plating gold film on the curved part of the fiber, and it demonstrated high sensitivity in measuring magnetic field intensity and direction.
Article
Engineering, Multidisciplinary
Jia Wang, Shengli Pu, Zijian Hao, Chencheng Zhang, Weinan Liu, Yuanyuan Fan
Summary: A reflective vector magnetic field sensor with a wedge-shaped fiber tip based on surface plasmon resonance (SPR) and magnetic fluid (MF) has been fabricated and studied. The wedge-shaped fiber tip, obtained by grinding and polishing multimode fiber (MMF) and few-mode fiber (FMF), was plated with a nanoscale gold film to excite SPR. The fabricated tip was immersed in MF as the magnetic field sensitive material. Experimental results demonstrate that the magnetic field intensity and direction sensitivities of the sensors based on MMF and FMF are 2317 pm/mT, 497 pm/degrees and 6776 pm/mT, 2313 pm/degrees, respectively, indicating great potential of the proposed sensor for lab-on-fiber devices and applications.
Article
Optics
Yi Kang, Saima Kanwal, Shengli Pu, Baolin Liu, Dawei Zhang
Summary: Using ghost imaging and visual secret sharing, this study demonstrates a multi-level authentication approach that achieves high-quality image fusion and information authentication, with strong robustness and high security.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Zijian Hao, Shengli Pu, Mahieddine Lahoubi, Chencheng Zhang, Weinan Liu
Summary: A dual-channel temperature-compensated all-fiber-optic vector magnetic field sensor is proposed and analyzed theoretically, which integrates three optical surfaces on a single-mode fiber tip and utilizes the Kretschmann configurations and surface plasmon resonance for temperature compensation. This sensor achieves ultra-integration and miniaturization and provides a novel scheme for designing all-fiber-optic vector magnetic field sensing based on magnetic fluid.
Article
Optics
Shufei Han, Shengli Pu, Zijian Hao, Chencheng Zhang, Weinan Liu, Simiao Duan, Jiaqi Fu, Mingjue Wu, Peiwen Mi, Xianglong Zeng, Mahieddine Lahoubi
Summary: A novel vector magnetic field sensor with temperature compensation is proposed and investigated in this study. The sensor is realized by side-polishing a multi-mode optical fiber and adopting the surface plasmon resonance effect. It can be used for magnetic field strength and direction sensing, as well as temperature detection. The sensor exhibits easy fabrication, high sensitivity, and temperature compensation ability.
Article
Quantum Science & Technology
Yi Kang, Leihong Zhang, Hualong Ye, Baolin Liu, Shengli Pu, Dawei Zhang, Songlin Zhuang
Summary: This research proposes a novel visual cryptography technique based on ghost imaging. The spatial information of one visual key image is encoded into time-varying factors in ghost imaging and loaded onto Hadamard illumination patterns. The secret image can be recovered when the illumination patterns are projected onto another visual key image. This method combines the advantages of ghost imaging and visual cryptography, and has high scalability and broad application scenarios.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Yuanyuan Fan, Shengli Pu, Dihui Li, Yongliang Zhao, Min Yuan, Jia Wang, Weinan Liu
Summary: A magnetic field sensor based on symmetrically side-polished photonic crystal fiber (PCF) with regular hexagonal air holes is proposed in this study. Magnetic fluid (MF) is used as the magnetic field-sensitive material. The polished surfaces are coated with an indium tin oxide (ITO) film to generate lossy mode resonance (LMR) for magnetic field sensing. The obtained magnetic field sensitivity is 466.81 pm/Oe, which can be further adjusted by changing the thickness of the ITO film. The proposed structure is simple and has the capability of mass production, showing great potential for future development.
IEEE SENSORS JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Zijian Hao, Yongxi Li, Shengli Pu, Jia Wang, Fan Chen, Mahieddine Lahoubi
Summary: A novel fiber-optic vector magnetic field sensor has been developed, which utilizes the surface plasmon resonance (SPR) generated by gold film plating and the magnetic fluid (MF) as the sensing elements to detect the magnetic field intensity and direction by monitoring the dip wavelength of SPR.
