Correction
Engineering, Electrical & Electronic
Jordan Budhu, Yahya Rahmat-Samii
Summary: Table II in the article appeared inaccurately, but the correct version has been provided. The IEEE apologizes for the error.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Nanoscience & Nanotechnology
Alvaro Rodriguez Echarri, Joel D. Cox, F. Javier Garcia de Abajo
Summary: This study introduces a scheme for generating entangled photon pairs directly in optical waveguides, without the need for bulky optical elements. The scheme utilizes the nonlinearity of the waveguide material and offers high conversion efficiency, making it suitable for efficient and compact quantum optics devices.
Article
Engineering, Electrical & Electronic
Jingcui Song, Xiaojie Guo, Wentao Peng, Jingshun Pan, Lei Wan, Tianhua Feng, Siqing Zeng, Dong Liu, Bin Zhang, Mingjie Zhang, Zhaohui Li
Summary: In this study, experimental characterizations of stimulated Brillouin scattering (SBS) in low-loss GeSbS chalcogenide waveguides were reported. The results demonstrated high Brillouin gain, low linear propagation loss, and negligible nonlinear loss in the GeSbS waveguides, making them very promising for on-chip Brillouin applications. Key parameters such as Brillouin frequency shift, intrinsic Brillouin linewidth, and Brillouin gain coefficient were investigated using a high-resolution pump-probe measurement technique.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Feng Ye, Jiayao Huang, M. S. Aruna Gandhi, Qian Li
Summary: The study demonstrates a method to generate high-repetition-rate ultrashort soliton trains on a chip-scale silicon waveguide, compressing pulse duration and achieving efficient self-similar compression through pulse shaping and compression techniques.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Yulei Wang, Kai Li, Yu Yu, Sensen Li, Yunfei Li, Wuyue Wang, Changyu Song, Zhiyong Wang, Gong Wang, Yong Zhang, Zhiwei Lu, Yuhai Li, Tongyu Liu, Xiusheng Yan
Summary: This paper proposes a design scheme for SBS lasers based on silicon ring waveguides, which achieve tunable phonon frequencies emission by modifying the ring cavity widths, providing a new technical approach for designing tunable SBS lasers.
FRONTIERS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Isaac Doughan, Kehinde Oyemakinwa, Olli Ovaskainen, Matthieu Roussey
Summary: This article presents a novel low-loss polymer channel hybridized with a titania core, resulting in a nano-waveguide elongated in the normal direction to the substrate. The main purpose is to utilize the quasi-transverse magnetic (TM) mode as the dominant mode in compact photonic circuitry. Detailed design analysis demonstrates that a thin layer of a higher-refractive index material in a trench within the waveguide core can enhance the confinement and reduce the propagation losses. The waveguide is demonstrated at telecom wavelengths with propagation losses as low as 1.75 +/- 0.32 dB/cm in a 200 nm x 900 nm section of the core.
Article
Engineering, Electrical & Electronic
Zhizhong Yan, Haoyu He, Han Liu, Meng Iu, Osman Ahmed, Eric Chen, Youichi Akasaka, Tadashi Ikeuchi, Amr S. Helmy
Summary: Parametric gain in a semiconductor Bragg Reflection Waveguide (BRW) chip has been achieved by using chi((2)) nonlinearities. More than 18 dBs of parametric gain for both TE and TM modes can be obtained in a device length of 100 s of micrometers, with polarization insensitivity within the 1550 nm spectrum. These sub-photon per pulse sensitive AlGaAs BRW waveguides open up new possibilities for on-chip quantum information processing using compact, micrometer-scale devices.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Review
Optics
Brett N. N. Carnio, Oussama Moutanabbir, Abdulhakem Y. Y. Elezzabi
Summary: Continued development in various fields is driving the need for terahertz-wave technologies to be applied in practical situations. The compatibility of waveguides with on-chip fabrication techniques makes them an ideal choice for on-chip terahertz radiation generation. This review examines different types of waveguides and their ability to produce terahertz radiation, providing valuable information for further development in this area.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Zuoqin Ding, Han Wang, Taige Li, Xia Ouyang, Yaocheng Shi, A. Ping Zhang
Summary: This paper presents the design, fabrication, and characterization of polymer optical waveguides using digital UV lithography. Nonlinear compensation and proximity effects compensation are applied to minimize stitching loss and improve the accuracy of the fabrication process. The experimental results demonstrate the feasibility of the lithography technology in producing waveguides and other related devices with low bending loss and propagation loss.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Ping Zhao, Zhichao Ye, Magnus Karlsson, Victor Torres-Company, Peter A. Andrekson
Summary: This paper reports a low-noise optical phase-sensitive amplifier (PSA) enabled by a single compact integrated silicon nitride photonic waveguide, which allows optical signal processing at different wavelengths. The experimental results show that silicon-nitride-based PSAs are promising for the next generation of broadband optical signal processing and communication systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Ezgi Sahin, Boris Zabelich, Ozan Yakar, Edgars Nitiss, Junqiu Liu, Rui N. Wang, Tobias J. Kippenberg, Camille-Sophie Bres
Summary: Difference-frequency generation (DFG) is crucial for generating coherent light at long wavelengths, particularly in the middle infrared range. All-optical poling is a versatile method to induce an effective second-order susceptibility in centrosymmetric materials, compensating for their lack of inherent second-order nonlinearity. By exploiting induced effective chi((2)) in stoichiometric silicon nitride waveguides, both near- and non-degenerate DFG have been achieved, unlocking nonlinear frequency conversion near 2 μm at telecommunication wavelengths.
Article
Optics
Yousuf Aborahama, Mo Mojahedi
Summary: Designing optical fields with predetermined properties in source-free inhomogeneous media has been a long-sought goal due to its potential in various applications. A general framework based on the Helmholtz equation is provided to design optical fields with prechosen amplitude and phase. The analytical approach is verified through different techniques, demonstrating its validity in generating desired optical fields in various inhomogeneous media.
Article
Physics, Multidisciplinary
Yongliang Zhang, Lina Shi, Che Ting Chan, Kin Hung Fung, Kai Chang
Summary: Recent advances in electromagnetic nonreciprocity have led to the exploration of geometrical approaches for engineering nonreciprocal electromagnetic response. In this study, we introduce the concept of generalized electromagnetic continua composed of structured points with additional degrees of freedom beyond coordinate transformation. Our findings show that general nonreciprocal media possess a unique time-varying Riemannian metric structure with local spinning components. This theory not only provides insights into the fundamental understanding of electromagnetic nonreciprocity, but also offers a practical principle for designing nonreciprocal devices through frame transformation.
PHYSICAL REVIEW LETTERS
(2023)
Review
Optics
Yuxi Fang, Changjing Bao, Si-Ao Li, Zhi Wang, Wenpu Geng, Yingning Wang, Xu Han, Jicong Jiang, Weigang Zhang, Zhongqi Pan, Zhaohui Li, Yang Yue
Summary: Supercontinuum (SC) has wide applications in optical communications, signal processing, metrology, and spectroscopy. This paper reviews the latest progress on various nanophotonic waveguides for Supercontinuum generation (SCG), including the discussion of different materials and their properties, the consideration of waveguide properties, and the analysis of different broadening mechanisms. It also provides perspectives on the spectral coverage, dispersion curves, and novel materials for SCG in nanophotonic waveguides.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
J. E. Gomez Correa
Summary: This paper presents a Fermat's-ray-invariants-based ray tracing method in a non-normalized gradient-index (GRIN) medium. The method is simple and eliminates the need for normalization to reduce ray tracing complications in GRIN media.
