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Landslide detection from satellite imagery has advanced through deep learning, yet most models rely on large, highly correlated spectral-topographic inputs whose contributions remain poorly understood. The question of which channels are…

机器学习 · 计算机科学 2026-05-12 Arsalaan Ahmad , Oktay Karakus , Paul L. Rosin

We theoretically investigate integrated photonic resonators formed by two mutually coupled Sagnac loop reflectors (MC-SLRs). Mode interference in the MC-SLR resonators is tailored to achieve versatile filter shapes with high performance,…

光学 · 物理学 2021-02-09 Hamed Arianfard , Jiayang Wu , Saulius Juodkazis , David J. Moss

Significant progress has been made in wireless Joint Source-Channel Coding (JSCC) using deep learning techniques. The latest DL-based image JSCC methods have demonstrated exceptional performance during transmission, while also avoiding…

信号处理 · 电气工程与系统科学 2023-08-29 Hongjie Yuan , Weizhang Xu , Yuhuan Wang , Xingxing Wang

Mode splitting induced by coherent optical mode interference in coupled resonant cavities is a key phenomenon in photonic resonators that can lead to powerful and versatile filtering functions, in close analogy to…

光学 · 物理学 2022-10-20 David J. Moss

Integrated-photonics microchips now enable a range of advanced functionalities for high-coherence applications such as data transmission, highly optimized physical sensors, and harnessing quantum states, but with cost, efficiency, and…

In the practical application of restoring low-resolution gray-scale images, we generally need to run three separate processes of image colorization, super-resolution, and dows-sampling operation for the target device. However, this pipeline…

计算机视觉与模式识别 · 计算机科学 2022-01-13 Jiangning Zhang , Chao Xu , Jian Li , Yue Han , Yabiao Wang , Ying Tai , Yong Liu

In addition to their strong nonlinear optical response, transition metal dichalcogenides (TMDCs) possess a high refractive index in the visible and infrared regime. Therefore, by patterning those TMDCs into dielectric nanoresonators, one…

Weakly supervised semantic segmentation (WSSS) based on image-level labels is challenging since it is hard to obtain complete semantic regions. To address this issue, we propose a self-training method that utilizes fused multi-scale…

计算机视觉与模式识别 · 计算机科学 2023-05-11 Guoqing Yang , Chuang Zhu , Yu Zhang

In frequency division duplex (FDD) systems, acquiring channel state information (CSI) at the base station (BS) traditionally relies on limited feedback from mobile terminals (MTs). However, the accuracy of channel reconstruction from…

信息论 · 计算机科学 2025-03-10 Yunseo Nam , Jiwook Choi

Microwave photonics (MWP) has adopted a number of important concepts and technologies over the recent pasts, including photonic integration, versatile programmability, and techniques for enhancing key radio frequency performance metrics…

Optical switches are one of the most important elements of integrated photonics. Here, we designed, fabricated and characterized several nanophotonic optical switches (NOSs) in silicon that exhibit ultra-compact footprint, along with…

光学 · 物理学 2019-04-02 Apratim Majumder , Mark Mondol , Trisha L. Andrew , Rajesh Menon

We report an efficient energy-time entangled photon-pair source based on four-wave mixing in a CMOS-compatible silicon photonics ring resonator. Thanks to suitable optimization, the source shows a large spectral brightness of 400\,pairs of…

We propose the synthesis of frequency dispersion of layered structures based on the design of multi-ordered optical filters using nanocircuit concepts. Following the well known insertion loss method commonly employed in the design of…

光学 · 物理学 2017-04-05 Yue Li , Iñigo Liberal , Nader Engheta

Performant on-chip spectrometers are important for advancing sensing technologies, from environmental monitoring to biomedical diagnostics. As device footprints approach the scale of the operating wavelength, previously strategies,…

Recent advances in the design and fabrication of on-chip optical microresonators has greatly expanded their applications in photonics, enabling metrology, communications, and on-chip lasers. Designs for these applications require fine…

Wireless Sensor Networks (WSNs) enable a wealth of new applications where remote estimation is essential. Individual sensors simultaneously sense a dynamic process and transmit measured information over a shared channel to a central fusion…

最优化与控制 · 数学 2016-11-18 Yilin Mo , Emanuele Garone , Alessandro Casavola , Bruno Sinopoli

This paper proposes a wideband dual-polarized phased array with ultra-wideband scattering cross section (SCS) reduction. The antenna elements are loaded on a bilateral stepped ground. This ground is carefully designed in terms of height…

光学 · 物理学 2025-10-20 Yu Luo , Shi-Gang Fang , Peng-Fa Li , Yuhao Feng , Shi-Wei Qu , Shiwen Yang

We present a design approach for realizing on-chip wavelength division demultiplexing (WDD) schemes by integrating all-dielectric metasurfaces of TiO2 nanorod arrays into a SiN waveguide. The designed metasurface locally modifies the…

光学 · 物理学 2022-08-09 Amged Alquliah , Mohamed ElKabbash , JinLuo Cheng , Wei Li , Chunlei Guo

We present a compact on-chip resonator enhanced silicon-MSM photodetector in $850$ $nm$ wavelength band for communication and lab-on-chip bio-sensing applications. We report the highest responsivity of 0.81 A/W for a 5 $\mu m$ long device.…

应用物理 · 物理学 2020-12-02 Avijit Chatterjee , Saumitra Sam , Sujit Kumar Sikdar , Shankar Kumar Selvaraja

Broadband spectral filters are highly sought-after in many integrated photonics applications such as ultra-broadband wavelength division multiplexing, multi-band spectroscopy, and broadband sensing. In this study, we present the design,…

光学 · 物理学 2024-09-24 Kazim Gorgulu , Emir Salih Magden