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We develop a pragmatic multi-user (MU) massive multiple-input multiple-output (MIMO) channel model tailored to the THz band, encompassing factors such as molecular absorption, reflection losses and multipath diffused ray components. Next,…

Signal Processing · Electrical Eng. & Systems 2026-03-24 Abhisha Garg , Suraj Srivastava , Varsha Dubey , Aditya Jagannatham , Lajos Hanzo

Nanomechanical oscillators have been employed as transducers to measure force, mass and charge with high sensitivity. They are also used in opto- or electromechanical experiments with the goal of quantum control and phenomena of mechanical…

Optics · Physics 2015-06-03 Emanuel Gavartin , Pierre Verlot , Tobias J. Kippenberg

Wavelength division multiplexers are fundamental to the functioning and performance of integrated photonic circuits, with applications ranging from optical interconnects to sensing and quantum technologies. Current solutions are limited by…

Optics · Physics 2026-03-11 Sydney Mason , Geun Ho Ahn , Jakob Grzesik , Sungjun Eun , Jelena Vučković

Silicon photonics promises to address the challenges for next-generation short-reach optical interconnects. Growing bandwidth demand in hyper-scale data centers and high-performance computing motivates the development of faster and…

Silicon photonics with the advantages of low power consumption, low cost, and high yield is a crucial technology for facilitating high-capacity optical communications and interconnects. The graphene photodetectors (GPDs) featuring broadband…

Space-division multiplexing is a promising technology in optical fibre communication to improve the transmission capacity of a single optical fibre. However, the number of channels that can be multiplexed is limited by the crosstalks…

Optics · Physics 2020-02-06 Pengfei Fan , Michael Ruddlesden , Yufei Wang , Luming Zhao , Chao Lu , Lei Su

At the core of an ideal single photon detector is an active material that ideally absorbs and converts photons to discriminable electronic signals. A large active material volume favours high-efficiency absorption, but often at the expense…

Instrumentation and Detectors · Physics 2015-09-15 Mohsen K. Akhlaghi , Ellen Schelew , Jeff F. Young

Integrated photonic active beamforming can significantly reduce the size and cost of coherent imagers for LiDAR and medical imaging applications. In current architectures, the complexity of photonic and electronic circuitry linearly…

Signal Processing · Electrical Eng. & Systems 2021-08-24 Aroutin Khachaturian , Reza Fatemi , Ali Hajimiri

We demonstrated an ultra-broadband, polarization-insensitive and wide-angle metamaterial absorber for terahertz (THz) frequencies using arrays of truncated pyramid unit structure made of metal-dielectric multilayer composite. In our design…

Optics · Physics 2014-06-02 Jianfei Zhu , Zhaofeng Ma , Wujiong Sun , Fei Ding , Qiong He , Lei Zhou , Yungui Ma

A monolithic multi-channel analog transient recorder, implemented using switched capacitor sample-and-hold circuits and a high-speed analogically-adjustable delay-line-based write clock, has been designed, fabricated and tested. The 2.1 by…

Instrumentation and Detectors · Physics 2016-12-06 Stuart A. Kleinfelder

Advances in integrated photonics have enabled unprecedented level of control of light, powering a wide range of photonic technologies from communications and computing to precision metrology and quantum information. However, the…

We demonstrate a complete Silicon Photonics WDM link relying on a single section semiconductor mode-locked laser and a single SOA to support up to 12 multiplexed channels with a bit error rate of 1e-12 at serial data rates of 14 Gbps…

This paper presents an indoor visible light communication (VLC) system in conjunction with an imaging receiver with parallel data transmission (spatial multiplexing) to decrease the effects of inter-symbol interference (ISI). To distinguish…

Signal Processing · Electrical Eng. & Systems 2018-11-06 Safwan Hafeedh Younus , Aubida A. Al-Hameed , Ahmed Taha Hussein , Mohammed T. Alresheedi , Jaafar M. H. Elmirghani

Future communication system requires large bandwidth to achieve high data rate up to multigigabit/ sec, which makes analog-to-digital (ADC) become a key bottleneck for the implementation of digital receivers due to its high complexity and…

Information Theory · Computer Science 2013-06-05 Zhiyong Wang , Huarui Yin , Wenyi Zhang , Guo Wei

We numerically demonstrate a novel monolayer graphene-based perfect absorption multi-layer photonic structure by the mechanism of critical coupling with guided resonance, in which the absorption of graphene can significantly close to 99% at…

Optics · Physics 2017-11-15 Xiaoyun Jiang , Tao Wang , Shuyuan Xiao , Xicheng Yan , Le Cheng

Optical microcavities with rotational symmetry have been widely used for narrowing linewidth and reducing frequency noise, however, the narrow but wavelength dependent optical feedback restricts the narrow linewidth laser works only at some…

The explosion of data volume in communications, AI training, and cloud computing requires efficient data handling, which is typically stored as digital electrical information and transmitted as wireless radio frequency (RF) signals or light…

Within the ATTRACT FASTPIX project, a monolithic pixel sensor demonstrator chip has been developed in a modified 180 nm CMOS imaging process technology, targeting sub-nanosecond timing precision for single ionising particles. It features a…

The increasing demand for energy-efficient hardware for artificial intelligence (AI) and data centres requires integrated photonic solutions delivering optical transceivers with Tbit/s data rates and energy consumption$<$1pJ/bit. Here, we…