Article
Optics
Jialang Zhang, Siyuan Zhang, Junna Yao, Xinhua Jiang, Anting Wang, Qiwen Zhan
Summary: In this study, we propose a new type of dispersion-flattened waveguide without a slot-assisted structure that can achieve ultra-flat group velocity dispersion in the mid-infrared region. The absence of the slot-assisted structure reduces the sensitivity of the dispersion profile to the waveguide dimensions, making waveguide fabrication easier.
CHINESE OPTICS LETTERS
(2023)
Article
Optics
Yushuo Guo, Yuhao Guo, Zeinab Jafari, Lijuan Xu, Lin Zhang
Summary: This article presents the characteristics and potential applications of SiC and diamond-based waveguides. These waveguides exhibit both single-mode and single-polarization properties, as well as dispersion flattening, making them suitable for broadband nonlinear applications.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Chenghan Wu, Tom Reep, Steven Brems, Julien Jussot, Vivek Mootheri, Joris Van Campenhout, Cedric Huyghebaert, Marianna Pantouvaki, Zheng Wang, Dries Van Thourhout
Summary: This paper presents an experimental and theoretical investigation of a graphene-integrated electro-absorption modulator (EAM) based on a slot waveguide. The device exhibits impressive modulation efficiency and bandwidth due to the enhanced light-matter interaction of graphene. Furthermore, extensive design studies were carried out to explore the trade-offs in insertion loss, extinction ratio, and bandwidth, providing valuable insights into the influence of each design parameter. It is important to note that the slot waveguide can be seamlessly integrated into high-density systems through standard deep ultraviolet lithography.
Article
Engineering, Electrical & Electronic
Jan Barowski, Lisa Schmitt, Kristof Kother, Martin Hoffmann
Summary: This contribution presents a design approach and characterization results for dielectric slot waveguides in highly resistive silicon for operation in the terahertz frequency range. The authors discuss the fundamentals and figures of merit of dielectric slot waveguides and present analytical solutions and numerical results from field simulations. Prototypes are fabricated using a process for HR-Si MEMSs, including a silicon-based metamaterial for mechanical support. The devices are measured and characterized using VNA-based two-port measurements, and the obtained losses are reported for the first time.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Optics
Eva Kempf, Pedro Rojo Romeo, Alban Gassenq, Arnaud Taute, Paul Chantraine, Jimmy John, Ali Belarouci, Stephane Monfray, Frederic Boeuf, Paul G. Charette, Regis Orobtchouk
Summary: This work presents a design of a half-etch horizontal slot waveguide based on SiN, where the upper SiN layer is selectively etched to confine the mode laterally. The numerical modeling, fabrication, and characterization of passive waveguiding components are discussed. The fabricated racetrack resonators demonstrate the high potential of these horizontal slot waveguides for active integrated photonics applications.
Article
Optics
Xiaodong Shi, Jingjing Zhang, Weichen Fan, Yaoqin Lu, Nianhua Peng, Karsten Rottwitt, Haiyan Ou
Summary: This study proposes a compact coupling scheme for silicon carbide polarization beam splitter, which enables efficient low-birefringence polarization splitting by modulating the magnetic mode distribution. The performance of the device is experimentally validated.
PHOTONICS RESEARCH
(2022)
Article
Optics
Martin Heusinger, Thomas Fluegel-Paul, Kevin Grabowski, Dirk Michaelis, Stefan Risse, Uwe D. Zeitner
Summary: This article introduces a modern grating imaging spectrograph that reduces aberrations by combining a grating and a prism, with the grating attached to one facet of the prism. The device offers high diffraction efficiency, enormous angular dispersion, and a nearly constant angular dispersion profile compared to standard diffraction gratings.
Article
Optics
Ruolan Yu, Jie Zhang, Weiwei Chen, Pengjun Wang, Yan Li, Jun Li, Qiang Fu, Tingge Dai, Hui Yu, Jianyi Yang
Summary: This paper presents and investigates three optical reversible logic gates utilizing graphene-silicon slot waveguides, achieving relatively compact and broadband performance through the design of cascaded Mach-Zehnder interferometers and multimode interference couplers for Toffoli, Peres, and Fredkin gates. Variations in chemical potential lead to significant changes in effective refractive index, allowing for efficient operation with specific parameters at 1550 nm. Extinction ratios and crosstalk levels are also analyzed for the designed gates.
Article
Optics
Qiyuan Li, Xinzhe Xiong, Zhiwei Yan, Guanglian Cheng, Fanglu Xu, Zengfan Shen, Qiyuan Yi, Yu Yu, Li Shen
Summary: This paper proposes and investigates a graphene-based electro-absorption modulator and microring modulator for communication and detection systems in the mid-infrared region. These modulators, using a suspended germanium waveguide platform and incorporating double-layer graphene, demonstrate high modulation performance and bandwidth.
Article
Nanoscience & Nanotechnology
Henock D. Yallew, Marek Vlk, Anurup Datta, Sebastian Alberti, Roman A. Zakoldaev, Jens Hovik, Astrid Aksnes, Jana Jagerska
Summary: The hybrid integration of photonic chips with electronic and micromechanical circuits has the potential to create miniature and accurate laser spectroscopic sensors. However, the sensitivity of chip-scale devices has been limited by various factors. In this study, a nanophotonic waveguide for methane detection was developed, which achieved a remarkably low limit of detection. The effects of adsorbed humidity on the performance of mid-infrared waveguides were also investigated.
Article
Physics, Multidisciplinary
James Byers, Kapil Debnath, Hideo Arimoto, Muhammad K. Husain, Moise Sotto, Joseph Hillier, Kian Kiang, David J. Thomson, Graham T. Reed, Martin Charlton, Shinichi Saito
Summary: By breaking the left/right symmetry in a bi-planar double-SOI photonic crystal fin-waveguide, this paper demonstrates the conversion of TE mode to TM mode. FDTD simulations show TE mode coupling to the robust TM mode inside the Brillouin zone, with broadband transmission data indicating propagation of horizontal-slot TM mode within the TE bandgap for mismatched fabricated devices. This work simultaneously showcases TE to TM mode conversion and the narrowest Si photonics SiO2 slot-mode propagation reported in the literature, with potential applications in telecommunications.
FRONTIERS IN PHYSICS
(2021)
Article
Biotechnology & Applied Microbiology
Muddassir Iqbal, YouQiao Ma, Delin Zhao, Babak Parvaei
Summary: GeSbSe glass was characterized for sensor mechanism and adaptive polarization control in optical waveguides, leading to dispersion profile and birefringence parameter modifications with changes in Fermi energy and Mobility values. The study proposes a refractive index dispersion sensor and automated polarization management sources for light on chip circuits using GeSbSe in T-slot waveguide structures.
CURRENT NANOSCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Weijie Gao, Wendy S. L. Lee, Xiongbin Yu, Masayuki Fujita, Tadao Nagatsuma, Christophe Fumeaux, Withawat Withayachumnankul
Summary: Effective-medium-clad dielectric waveguides are constructed in a high-resistivity float-zone silicon wafer, with claddings defined by deep subwavelength perforations. These waveguides support both E-11(x) and E-11(y) modes with low loss and low dispersion. The investigation extends to analyzing dispersion, cross-polarization, crosstalk, bends, and crossings over an operation frequency range of 220-330 GHz (WR-3 band).
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Myungjae Lee, Hanyu Hong, Jaehyung Yu, Fauzia Mujid, Andrew Ye, Ce Liang, Jiwoong Park
Summary: This paper reports three-atom-thick waveguides, called delta waveguides, based on wafer-scale molybdenum disulfide (MoS2) monolayers, which can guide visible and near-infrared light over millimeter-scale distances with low loss and efficient in-coupling. The extreme thinness of the waveguides enables a light-trapping mechanism similar to a delta-potential well in quantum mechanics, allowing for guided waves that propagate freely along the in-plane direction but are confined along the out-of-plane direction. The integration of thin-film optical components with delta waveguides demonstrates key functionalities essential for two-dimensional photonics.
Article
Optics
Lorenz Weiss, Andreas Gritsch, Benjamin Merkel, Andreas Reiserer
Summary: Resonant spectroscopy of erbium implanted into nanophotonic silicon waveguides reveals 1 GHz inhomogeneous broadening and homogeneous linewidths below 0.1 GHz, introducing a promising materials platform for on-chip quantum information processing.
Article
Engineering, Electrical & Electronic
Peicheng Liao, Changjing Bao, Ahmed Almaiman, Arne Kordts, Maxim Karpov, Martin Hubert Peter Pfeiffer, Lin Zhang, Fatemeh Alishahi, Yinwen Cao, Kaiheng Zou, Ahmad Fallahpour, Ari N. Willner, Moshe Tur, Tobias J. Kippenberg, Alan E. Willner
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2019)
Correction
Engineering, Electrical & Electronic
Meng Zhang, Henan Liu, Bing Wang, Guifang Li, Lin Zhang
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2019)
Article
Engineering, Electrical & Electronic
Lijuan Xu, Minghui Yang, Yuhao Guo, Henan Liu, Guifang Li, Lin Zhang
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2019)
Article
Engineering, Electrical & Electronic
Yuxi Fang, Changjing Bao, Zhi Wang, Bo Liu, Lin Zhang, Xu Han, Yuxuan He, Hao Huang, Yongxiong Ren, Zhongqi Pan, Yang Yue
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2020)
Article
Engineering, Electrical & Electronic
Xin Tong, Henan Liu, Guifang Li, Lin Zhang
Summary: The study introduces an integrated waveguide optical tweezer design that achieves focusing of upward radiation through etched trenches on a waveguide. Optimization of the antenna's structural parameters generates a quasi-Gaussian field distribution above the antenna. The gradient distribution of the electric field produces gradient force, enabling effective optical trapping of microscale particles.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Xin Tong, Hao Tian, Yongjun Guo, Meng Zhang, Lin Zhang
Summary: The study introduces a method of integrating nanophotonic traps in a microfluidic channel, utilizing a slot waveguide and nano-slit to generate strong optical forces for trapping nanoparticles, forming a large array of optical traps expected for application in biological nanoparticle research.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Yaping Liu, Yongmin Jung, Zhiqun Yang, Lin Zhang, David J. Richardson
Summary: A new type of all-fiber mode scrambler is proposed for mode division multiplexed data transmission based on few mode fibers, achieving low loss and wideband mode coupling by randomly placing multiple point-loads along the fiber length. An exemplar experimental demonstration with 150 randomly located point-loads in step-index two mode fibers shows uniform mode coupling over the C band with an insertion loss of less than 1 dB.
IEEE PHOTONICS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Zhongjing Hu, Lijuan Xu, Jing Wang, Yuke Zhai, Lin Zhang
Summary: This study demonstrated supercontinuum generation in a dispersion-engineered silicon nitride waveguide pumped with 10ps pulses at 1550 nm wavelength, resulting in a spectrum from 656 to 3867 nm with power variation <15 dB and a very flat pedestal with <5 dB variation. The research highlights the unique role of dispersion tailoring in achieving a broad and flat supercontinuum generation, making it highly desirable for various applications.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Zhi Cheng, Xin Tong, Lin Zhang
Summary: Near-field optical tweezers integrated on a chip are gaining attention for biological and chemical analyses. A low-loss Si waveguide with a high intensity gradient in the electric field is proposed for trapping microparticles. The device has high transmittance and the ability to analyze optical forces in all three dimensions.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Weicheng Chen, Rongxiang Guo, Dian Wan, Tarun Sharma, Lin Zhang, Tiegen Liu, Zhenzhou Cheng
Summary: On-chip Kerr frequency combs provide unprecedented opportunities for optical communications and optical interconnects with compact, low-cost, and high-density wavelength-division multiplexing (WDM) techniques. A dual-mode Kerr frequency comb based on a graphene-on-silicon (GOS) microring is proposed to overcome the limitation of traditional approaches and achieve high-speed optical communications.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Xiushan Du, Yuke Zhai, Leonardo Midolo, Lin Zhang, Xiaoyan Zhou
Summary: This paper proposes a method for efficient frequency conversion using a nanomechanical silicon-rich nitride waveguide device, to address the frequency conversion challenge in on-demand single-photon sources. Numerical results show that optimal conversion efficiency over 99% and high signal-to-noise ratio can be achieved when the waveguide loss is negligible.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Wenpu Geng, Yuxi Fang, Yingning Wang, Zhi Wang, Yan-ge Liu, Lin Zhang, Changjing Bao, Yongxiong Ren, Zhongqi Pan, Yang Yue
Summary: In this study, a dual concentric-ring-core fiber design was proposed to achieve near-zero and flat dispersion profiles over a 3007-nm wavelength range with four zero-dispersion wavelengths for the OAM mode. The precise position of the zero-dispersion wavelengths can be tailored by varying the structural variables and the germanium-doped concentration of the silica-based fiber. Simulation results showed that by pumping a 50-fs 600-kW Gaussian pulse at the central wavelength of 1900 nm into a 2-mm designed fiber, the OAM(3,1) mode supercontinuum spectrum can achieve beyond three-octave spanning from 445 to 3942 nm at -40 dB level. By further optimizing the proposed fiber structure for the OAM(1,1) mode with <60 ps/(nm.km) dispersion variation over a 3210-nm bandwidth, the generated supercontinuum can cover nearly three octaves.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Rui Duan, Yi Tian Thung, Zitong Zhang, Emek Goksu Durmusoglu, Yichen He, Lian Xiao, Calvin Xiu Xian Lee, Wen Siang Lew, Lin Zhang, Hanyang Li, Jun Yang, Hilmi Volkan Demir, Handong Sun
Summary: Soft matter-based microlasers, with their flexibility and functional network topology, are considered as excellent building blocks for photonic interconnected networks. However, challenges like poor lasing stability and high lasing threshold hinder their potential. In this study, a high-quality, low-threshold nanoplatelets-based polymer microfiber laser and its photonic interconnected networks are successfully demonstrated. The work pioneers the exploration of polygonal self-coupling microlasers and provides insights for unit design and programming in future photonic network systems.
LASER & PHOTONICS REVIEWS
(2023)
Article
Computer Science, Information Systems
Lijuan Xu, Yuhao Guo, Jing Wang, Zhaohong Han, Henan Liu, Jurgen Michel, Lionel C. Kimerling, Lin Zhang
Summary: This paper proposes a new type of athermal waveguide composed of TiO2 with a negative TOC and SiC with a positive TOC, which maintains near-zero TOC over a broad bandwidth and low anomalous dispersion. The waveguide structure is suitable for microresonators and can be bent tightly without experiencing significant losses.
Article
Computer Science, Information Systems
Yuxi Fang, Changjing Bao, Zhi Wang, Yange Liu, Lin Zhang, Si-Ao Li, Yiwen Zhang, Hao Huang, Yongxiong Ren, Zhongqi Pan, Yang Yue