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Beamforming techniques are utilized in millimeter wave (mmWave) communication to address the inherent path loss limitation, thereby establishing and maintaining reliable connections. However, adopting standard defined beamforming approach…

Networking and Internet Architecture · Computer Science 2025-09-16 Muhammad Baqer Mollah , Honggang Wang , Hua Fang

Interferometers and beam splitters are fundamental building blocks for photonic neuromorphic and quantum computing machinery. In waveguide-based photonic integrated circuits, beam-splitting is achieved with directional couplers that rely on…

Mesoscale and Nanoscale Physics · Physics 2024-06-10 Yandong Li , Minwoo Jung , Yang Yu , Yuchen Han , Baile Zhang , Gennady Shvets

We propose a wavelength-mode sorter realized by multi-plane light conversion (MPLC). For the first time, to our best knowledge, wavelengths and spatial modes can be sorted simultaneously. We first demonstrate pure wavelength sorting by a…

Compact, non-volatile optical switches on silicon platforms are essential for reconfigurable photonics, but the strong anisotropy of silicon waveguides leads to polarization-dependent performance. In this paper, we propose a…

Optics · Physics 2025-08-29 Fangfa Bao , Jiakai Ruan , Weijia Li , Wei Zhang , Guoxiang Wang , Xiang Shen , Yixiao Gao

Linking classical microwave electrical circuits to the optical telecommunication band is at the core of modern communication. Future quantum information networks will require coherent microwave-to-optical conversion to link electronic…

Compared with well-developed free space polarization converters, polarization conversion between TE and TM modes in waveguide is generally considered to be caused by shape birefringence, like curvature, morphology of waveguide cross section…

Optics · Physics 2024-03-12 Zelin Tan , Jianfa Zhang , Zhihong Zhu , Wei Chen , Zhengzheng Shao , Ken Liu , Shiqiao Qin

Millimeter wave (mmWave) communication, utilizing beamforming techniques to address the inherent path loss limitation, is considered as one of the key technologies to support ever increasing high throughput and low latency demands of…

Networking and Internet Architecture · Computer Science 2026-02-17 Muhammad Baqer Mollah , Honggang Wang , Mohammad Ataul Karim , Hua Fang

Microwave-to-optical transduction of single photons will play an essential role in interconnecting future superconducting quantum devices, with applications in distributed quantum computing and secure communications. Various transducers…

Quantum Physics · Physics 2025-04-25 Tian Xie , Rikuto Fukumori , Jiahui Li , Andrei Faraon

Full-vectorial finite difference method with perfectly matched layers boundaries is used to identify the single mode operation region of submicron rib waveguides fabricated using sili-con-on-insulator material system. Achieving high mode…

We perform phase-sensitive near-field scanning optical microscopy on photonic-crystal waveguides. The observed intricate field patterns are analyzed by spatial Fourier transformations, revealing several guided TE- and TM-like modes. Using…

Adiabatic waveguide taper and on-chip wavelength demultiplexer are the key components of photonic integrated circuits. However, these two kinds of devices which designed by traditional semi-analytic methods or brute-force search methods…

In order to better understand the variation mechanism of ozone abundance in the middle atmosphere, the simultaneous monitoring of ozone and other minor molecular species, which are related to ozone depletion, is the most fundamental and…

Instrumentation and Methods for Astrophysics · Physics 2020-08-25 Taku Nakajima , Kohei Haratani , Akira Mizuno , Kazuji Suzuki , Takafumi Kojima , Yoshinori Uzawa , Shin'ichiro Asayama , Issei Watanabe

We propose a dataset-based photonic simulation framework for multimode waveguide design, enabling ultra-fast simulations with high accuracy. Compared to conventional approaches, our method offers two to three orders of magnitude speed-up in…

Optics · Physics 2025-11-11 Jaesung Song , Young-Ik Sohn

Silica nanofibers fabricated by tapering optical fibers have attracted considerable interest as an ultimate platform for high-efficiency light-matter interactions. While previously demonstrated applications relied exclusively on the…

Optics · Physics 2020-09-22 Chang Kyun Ha , Kee Hwan Nam , Myeong Soo Kang

Improving the conversion efficiency is critical for advancing nonlinear photonic devices, enabling applications in ultrafast optics, quantum light sources, and high-resolution imaging. Herein, we present a bilayer waveguide integrated with…

Optics · Physics 2025-08-21 Xin Huang , Qi Lin , Sheng-Xuan Xia , Xiang Zhai , Gui-Dong Liu

A longitudinal mode-locked state can be converted to a transverse mode-locked state by exploiting the spectral and spatial filtering of an empty optical resonator. Carrier and amplitude modulation sidebands were simultaneously transmitted…

Optics · Physics 2023-06-26 Michael Zwilich , Florian Schepers , Carsten Fallnich

The successes of superconducting quantum circuits at local manipulation of quantum information and photonics technology at long-distance transmission of the same have spurred interest in the development of quantum transducers for efficient,…

Quantum Physics · Physics 2020-01-22 Marcelo Wu , Emil Zeuthen , Krishna Coimbatore Balram , Kartik Srinivasan

Efficient interconversion of both classical and quantum information between microwave and optical frequency is an important engineering challenge. The optomechanical approach with gigahertz-frequency mechanical devices has the potential to…

As silicon photonics transitions from research to commercial deployment, packaging solutions that efficiently couple light into highly-compact and functional sub-micron silicon waveguides are imperative but remain challenging. The 220 nm…

Emerging reconfigurable metasurfaces offer various possibilities in programmatically manipulating electromagnetic waves across spatial, spectral, and temporal domains, showcasing great potential for enhancing terahertz applications.…