Results 41 to 50 of about 582 (118)

Scalable Room‐Temperature Terahertz Graphene Cameras

Small Methods, EarlyView.
ABSTRACT Terahertz (THz) imaging has emerged as a powerful tool for non‐destructive, label‐free analysis across several scientific disciplines, ranging from materials science to biomedical research. By capturing the spatial‐dependent information in a broad range of frequencies, this technique enables the identification of chemical composition ...
Lili Shi, Leonardo Viti, Miriam S. Vitiello   +2 more
wiley   +1 more source

InGaAs Diodes for Terahertz Sensing—Effect of Molecular Beam Epitaxy Growth Conditions

Sensors, 2018
InGaAs-based bow-tie diodes for the terahertz (THz) range are found to be well suited for development of compact THz imaging systems. To further optimize design for sensitive and broadband THz detection, one of the major challenges remains: to understand
Vilius Palenskis, Linas Minkevičius, Jonas Matukas, Domas Jokubauskis, Sandra Pralgauskaitė, Dalius Seliuta, Bronislovas Čechavičius, Renata Butkutė, Gintaras Valušis   +8 more
doaj   +1 more source

HBN-Encapsulated, Graphene-based, Room-temperature Terahertz Receivers, with High Speed and Low Noise.

, 2022
Uncooled terahertz photodetectors (PDs) showing fast (ps) response and high sensitivity (noise equivalent power (NEP) 50 000 cm2 V-1 s-1) hexagonal boron nitride-encapsulated graphene, with asymmetric field enhancement produced by a bow-tie antenna ...

core   +1 more source

SiC resistive X‐ray beam monitor for intensity and position control of synchrotron light

Journal of Synchrotron Radiation, EarlyView.
The characterization of a silicon carbide free‐standing membrane resistive detector for spot‐size‐independent X‐ray beam position monitoring in transmission is presented.A silicon carbide (SiC) X‐ray beam position monitor is presented, based on a resistive charge‐division principle derived from lateral‐effect photodiodes and specifically adapted for ...
Gabriele Trovato, Niccolò La Rosa, Francesco La Via, Janin Lubeck, Antonio Manno, Samuele Moscato, Matthias Müller, Massimo Camarda   +7 more
wiley   +1 more source

Photon detectors: Thermal background noise-equivalent power with frequency-dependent detector efficiency

, 2004
Background thermal noise often becomes the limiting factor while detecting low signals of photon flux from a distant thermal source. This cannot be eliminated by simply cooling the photodetector.
Jha, Sudhanshu S., JHA, SS, Aditya, Raghavan, Jha, Sudhanshu S, Raghavan, Aditya, RAGHAVAN, A   +5 more
core   +1 more source

Monolithically Integrated THz Detectors Based on High-Electron-Mobility Transistors

Sensors
We present THz direct detectors based on an AlGaN/GaN high electron mobility transistor (HEMT), featuring excellent optical sensitivity and low noise-equivalent power (NEP).
Adam Rämer, Edoardo Negri, Eugen Dischke, Serguei Chevchenko, Hossein Yazdani, Lars Schellhase, Viktor Krozer, Wolfgang Heinrich   +7 more
doaj   +1 more source

Large Area Flexible Thin Layer Terahertz Detector

Advanced Electronic Materials, 2023
Due to the low photon energy in the relevant frequency band, fewer materials can directly excite carriers, and an extreme lack of high‐performance, large‐area detectors, limit the promotion, and development of 6G technology.
Qi Song, Yu Zhou, Yifei Wang, Feilong Gao, Jiatong Wang, Min Zhang, Yiran Wang, Bingyuan Zhang, Peiguang Yan, Bo Dong   +9 more
doaj   +1 more source

Enhanced Terahertz Thermoelectricity Via Engineered Van Hove Singularities and Nernst Effect in Moiré Superlattices

Advanced Functional Materials, Volume 36, Issue 50, 22 June 2026.
Moiré band engineering in graphene/hexagonal boron nitride–based superlattices unlocks van Hove singularities (VHSs) for terahertz (THz) optoelectronics. Tuning the Fermi level near these singularities, associated with secondary neutrality points (SNPs), enhances the photothermoelectric response.
Leonid Elesin, Arthur L. Shilov, Subhajit Jana, Ilya Mazurenko, Pierre A. Pantaleon, Mikhail Kashchenko, Nikita Krivovichev, Viacheslav Dremov, Igor Gayduchenko, Takashi Taniguchi, Kenji Watanabe, Yibo Wang, Kostya S. Novoselov, Dmitry A. Svintsov, Grigory Goltsman, Elena I. Titova, Denis A. Bandurin   +16 more
wiley   +1 more source

Noise characterization of patch antenna THz photodetectors

, 2018
Current noise fluctuations have been investigated in terahertz (THz) quantum well photodetectors embedded in antenna-coupled photonic architectures and compared with standard substrate-coupled mesa detectors.
Li, L, Gacemi, D., L. H. Li, Gacemi, D, Barbieri, S, D. Palaferri, Sirtori, C., Davies, A., A. G. Davies, Todorov, Y., C. Sirtori, Barbieri, S., E. H. Linfield, S. Barbieri, Y. Todorov, Palaferri, D, Linfield, EH, Linfield, E.,, Davies, AG, Palaferri, D., Linfield, E., H, D. Gacemi, Todorov, Y, Sirtori, C, Li, L.   +24 more
core   +1 more source

Generation-recombination noise: The fundamental sensitivity limit for kinetic inductance detectors [PDF]

, 2012
We present measurements of quasiparticle generation-recombination noise in aluminium Microwave Kinetic Inductance Detectors, the fundamental noise source for these detectors.
Diener, P., P. J. de Visser, Yates, S.J.C., Endo, A. (author), Endo, A., T. M. Klapwijk, De Visser, P.J., De Visser, P.J. (author), A. Endo, Klapwijk, T.M. (author), Baselmans, J.J.A., Baselmans, J.J.A. (author), J. J. A. Baselmans, Klapwijk, T.M., S. J. C. Yates, P. Diener, Diener, P. (author), Yates, S.J.C. (author)   +17 more
core   +1 more source