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Magnetic-field and microwave-frequency modulated DNP experiments have been shown to yield improved enhancements over conventional DNP techniques, and even to shorten polarization build-up times. The resulting increase in signal-to-noise…

Instrumentation and Detectors · Physics 2015-12-23 Mallory L. Guy , Lihuang Zhu , Chandrasekhar Ramanathan

We present novel tests of pre$-$main-sequence models based on individual dynamical masses for the M7 binary LSPM J1314+1320AB. Joint analysis of our Keck adaptive optics astrometric monitoring along with Very Long Baseline Array radio data…

Solar and Stellar Astrophysics · Physics 2016-08-17 Trent J. Dupuy , Jan Forbrich , Aaron Rizzuto , Andrew W. Mann , Kimberly Aller , Michael C. Liu , Adam L. Kraus , Edo Berger

We describe and demonstrate the use of a novel toroidal split-ring resonator to make accurate and precise measurements of the permittivity of liquids and gases. We first analytically show how the resonance frequency and quality factor of…

Instrumentation and Detectors · Physics 2019-01-07 Jake S. Bobowski , Aaron P. Clements

Harnessing parity-time (PT) symmetry with balanced gain and loss profiles has created a variety of opportunities in electronics from wireless energy transfer to telemetry sensing and topological defect engineering. However, existing…

Applied Physics · Physics 2022-07-26 Weidong Cao , Changqing Wang , Weijian Chen , Song Hu , Hua Wang , Lan Yang , Xuan Zhang

Micro-pattern gas detectors (MPGDs) are widely utilized in physics experiments owing to their excellent spatial resolution and high-rate capabilities. Within the PandaX-III experiment, which aims to investigate neutrinoless double beta…

Instrumentation and Detectors · Physics 2025-12-09 Yunzhi Peng , Yuanchun Liu , Zhiyong Zhang , Shaobo Wang , Jianbei Liu , Ming Shao , Yi Zhou

Inspired by the discovery of high temperature superconductivity in potassium-doped $p$-terphenyl, we examine the possibility of superconductivity in $p$-quaterphenyl with one more phenyl ring than $p$-terphenyl. The Meissner effect with…

Superconductivity · Physics 2018-01-26 Jia-Feng Yan , Ren-Shu Wang , Kai Zhang , Xiao-Jia Chen

Masers once represented the state-of-the-art in low noise microwave amplification technology, but eventually became obsolete due to their need for cryogenic cooling. Masers based on solid-state spin systems perform most effectively as…

We report the first empirical efficiency measurement of germanium-based thermophotovoltaic devices under high-temperature, high-irradiance conditions using a high view-factor calorimetric setup. Two TPV cell architectures were fabricated on…

Applied Physics · Physics 2026-02-10 A. M. Medrano , E. Lopez , Pablo Garcia-Linares , J. Villa , M. Gamel , M. Garin , I. Martin , C. Canizo , A. Datas

Sub-Terahertz (THz) frequencies between 100 GHz and 300 GHz are being considered as a key enabler for the sixth-generation (6G) wireless communications due to the vast amounts of unused spectrum. The 3rd Generation Partnership Project…

Signal Processing · Electrical Eng. & Systems 2022-03-09 Shihao Ju , Yunchou Xing , Ojas Kanhere , Theodore S. Rappaport

Terahertz (THz) communications are envisioned as a promising technology for sixth-generation (6G) and beyond systems, owing to its unprecedented multi-gigahertz (GHz) bandwidth. In this paper, channel measurement campaigns in indoor…

Information Theory · Computer Science 2022-05-03 Yi Chen , Chong Han , Ziming Yu , Guangjian Wang

Two-dimensional capacitively coupled radio frequency discharge in methane is simulated by PIC-MCC method. The results were obtained in pressure range 50-300 mTorr and voltage range 40-180 V for discharge frequency 13.56 MHz. The electron…

Plasma Physics · Physics 2009-11-10 A L Alexandrov , I V Schweigert

Ultrafast lasers with simultaneously high average and peak power have become indispensable for driving a multitude of applications, including high-harmonic generation, strong-field physics, and particle source applications. Both parametric…

In their article, Wang et al. [1] report a new scheme for THz heterodyne detection using a laser-driven LTG-GaAs photomixer [2, 3] and make the impressive claim of achieving near quantum-limited sensitivity at room temperature.…

Instrumentation and Methods for Astrophysics · Physics 2019-08-01 J. Zmuidzinas , B. Karasik , A. R. Kerr , M. Pospieszalski

Perfect absorption of radiation in a graphene sheet may play a pivotal role in the realization of technologically relevant optoelectronic devices. In particular, perfect absorption of radiation in the terahertz (THz) spectral range would…

Optics · Physics 2014-11-25 Fangli Liu , Y. D. Chong , Shaffique Adam , Marco Polini

Millimeter-wave superconducting resonators are a useful tool for studying quantum device coherence in a new frequency domain. However, improving resonators is difficult without a robust and reliable method for coupling millimeter-wave…

We demonstrate that a self-complementary checkerboard-like metasurface works as a broadband coherent perfect absorber (CPA) when symmetrically illuminated by two counter-propagating incident waves. A theoretical analysis based on wave…

Optics · Physics 2023-06-21 Yoshiro Urade , Yosuke Nakata , Toshihiro Nakanishi , Masao Kitano

We analyze the modulation instability induced by periodic variations of group velocity dispersion and nonlinearity in optical fibers, which may be interpreted as an analogue of the well-known parametric resonance in mechanics. We derive…

Optics · Physics 2015-06-11 Andrea Armaroli , Fabio Biancalana

The 1-10 terahertz (THz) spectral window is emerging as a key region for plenty of applications, requiring not yet available continuous-wave room-temperature THz spectrometers with high spectral purity and ultra-broad tunability. In this…

A wide-bandwidth and low-noise amplification chain in the microwave regime is crucial for the efficient read-out of quantum systems based on superconducting detectors, such as Microwave Kinetic Inductance Detectors (MKIDs), Transition Edge…

The lattice thermal conductivity ($\kappa$) of two ceramic materials, cerium dioxide (CeO$_2$) and magnesium oxide (MgO), is computed up to 1500 K using first principles and the phonon Boltzmann Transport Equation (PBTE) and compared to…

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