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We demonstrate a compact and robust device for simultaneous absolute frequency stabilization of three diode lasers whose carrier frequencies can be chosen freely relative to the reference. A rigid ULE multi-cavity block is employed, and,…

Multiple organs in a living system respond to environmental changes, and the signals from the organs regulate the physiological environment. Inspired by this biological feedback, we propose a simple autonomous system of active rotators to…

Statistical Mechanics · Physics 2020-03-02 Taegeun Song , Heetae Kim , Seung-Woo Son , Junghyo Jo

A programmable linear resistor with a compact footprint would have profound implications for microelectronics, enabling efficient in-sensor analog signal processing and in-memory computing. Non-volatile memory offers a potential solution…

In this paper, a broadband 1-bit coding metasurface-based reconfigurable intelligent surface (RIS) is presented. The unit cell of the metasurface consists of a wide dipole modified with interdigital capacitors and loaded with an SMP…

Systems and Control · Electrical Eng. & Systems 2026-05-05 Khagendra Joshi , Deepak Kumar Sahoo , Kamalesh Kumar K , Debidas Kundu , Vivek A. Bohara , Amalendu Patnaik

The design and performance of a multi-G-sample/s fully-synchronous analog transient waveform recorder I.C. ("SST") with fast and flexible trigger capabilities is presented. Containing 4 channels of 256 samples per channel and fabricated in…

Instrumentation and Detectors · Physics 2016-12-06 Stuart A. Kleinfelder , Edwin Chiem , Tarun Prakash

Superconducting microresonators have been successfully utilized as detection elements for a wide variety of applications. With multiplexing factors exceeding 1,000 detectors per transmission line, they are the most scalable low-temperature…

Vortex-based spin-torque oscillators can be made from extended spin valves connected to an electrical nanocontact. We study the implementation of frequency shift keying modulation in these oscillators. Upon a square modulation of the…

Materials Science · Physics 2015-03-17 M. Manfrini , T. Devolder , Joo-Von Kim , P. Crozat , C. Chappert , W. Van Roy , L. Lagae

The ability to arbitrarily dial in amplitudes and phases enables the fundamental quantum state operations pioneered for microwaves and then infrared and visible wavelengths during the second half of the last century. Self-seeded X-ray…

We present a sensitive, tunable radio-frequency resonator designed to detect reactive changes in nanoelectronic devices down to dilution refrigerator temperatures. The resonator incorporates GaAs varicap diodes to allow electrical tuning of…

Mesoscale and Nanoscale Physics · Physics 2019-03-28 David J. Ibberson , Lisa A. Ibberson , Geoff Smithson , James A. Haigh , Sylvain Barraud , M. Fernando Gonzalez-Zalba

The inability to efficiently tune the optical properties of waveguiding structures has been one of the major hurdles for the future scalability of integrated photonic systems. In silicon photonics, although dynamic tuning has been achieved…

Optics · Physics 2017-10-10 You-Chia Chang , Samantha P. Roberts , Brian Stern , Michal Lipson

An electronically reconfigurable dual-band-reflectarray antenna is presented in this paper. The tunable unit cell, a ring loaded square patch with a single varactor diode connected across the gap between the ring and the patch, is modeled…

Despite recent progress in nonlinear optics in wavelength-scale resonators, there are still open questions on the possibility of parametric oscillation in such resonators. We present a general approach to predict the behavior and estimate…

Optics · Physics 2021-02-22 Saman Jahani , Arkadev Roy , Alireza Marandi

We report on the design, implementation and characterization of fully digital control loops for laser frequency stabilization, differential phase-locking and performance optimization of the optical metrology system on-board the LISA…

On-chip reconfigurable intelligent surfaces (RIS) are expected to play a vital role in future 6G communication systems. This work proposed a CMOS-compatible on-chip RIS capable of achieving beam steering for the first time. The proposed…

Signal Processing · Electrical Eng. & Systems 2025-12-23 Xiarui Su , Xihui Teng , Yiyang Yu , Yiming Yang , Atif Shamim

This paper presents a sophisticated reconfigurable metasurface architecture that introduces an advanced concept of flexible full-array space-time wavefront manipulation with enhanced dynamic capabilities. The practical 2-bit phase-shifting…

Signal Processing · Electrical Eng. & Systems 2024-07-30 Yufei Zhao , Yuan Feng , Afkar Mohamed Ismail , Ziyue Wang , Yong Liang Guan , Yongxin Guo , Chau Yuen

This erratum provides an updated fitting function for the lasing threshold of finite-length cavities operating at a stationary inflection point (SIP) or regular band edge (RBE) resonance, clarifying their asymptotic scaling with the number…

In this paper, a new design has been proposed for the realization of high-frequency memcapacitor emulators built with three OTAs. This paper also proposes the application of memcapacitor as an amplitude modulator. Furthermore, applications…

Signal Processing · Electrical Eng. & Systems 2022-05-16 Pratik Kumar , Sajal K. Paul

Free-electron lasers (FELs) have been designed to operate over virtually the entire electromagnetic spectrum from microwaves through x-rays and in a variety of configurations including amplifiers and oscillators. Oscillators can operate in…

Accelerator Physics · Physics 2021-05-07 Peter J. M. van der Slot , Henry P. Freund

Reconfigurable antennas (RAs) utilize the electromagnetic (EM) domain to provide dynamic control over antenna radiation patterns, which offers an effective way to enhance power efficiency in wireless links. Unlike conventional arrays with…

Signal Processing · Electrical Eng. & Systems 2026-03-24 Alireza Fadakar , Yuchen Zhang , Hui Chen , Musa Furkan Keskin , Henk Wymeersch , Andreas F. Molisch

The integration of tunability mechanisms in the metasurface design has unleashed a tremendous potential for wireless communications. In particular, reconfigurable intelligent surfaces (RISs) can manipulate the reflections of an incident…

Applied Physics · Physics 2025-04-10 Vasileios G. Ataloglou , George V. Eleftheriades