Results 61 to 70 of about 36,061 (262)

Rational Device Design and Doping‐Controlled Performance in Fast‐Response π‐Ion Gel Transistors

Advanced Functional Materials, EarlyView.
π‐Ion gel transistors (PIGTs) achieve extraordinary transconductance and stability through device configuration optimization, high‐mobility conjugated polymer selection, and hole scavenger doping. The optimized PIGTs maintain performance on flexible substrates, enabling printed, fast‐response, and wearable electronics.
Masato Kato, Soh Kushida, Nafees Umar Draz, Dan Kyotani, Emanuel Smarsly, Kyota Yoshinaga, Wenhao He, Uwe H. F. Bunz, Kazuhiro Marumoto, Tatsuya Mori, Yohei Yamamoto   +10 more
wiley   +1 more source

Clean Up Behind You ‐ Novel Patterning Approach for Solid Immersion Lenses

Advanced Functional Materials, EarlyView.
A focused ion beam (FIB) milling strategy enables rapid fabrication of solid immersion lenses (SILs) with smooth, debris‐free surfaces eliminating the need for post‐processing. The optimized pattern improves efficiency and surface quality. SILs containing NV centers are also investigated, confirming the technique's suitability for quantum and photonic ...
Aleksei Tsarapkin, Stefan Facsko, Wentao Zhang, Anna Mogilatenko, Kilian Unterguggenberger, Bailiang Li, Cem Güney Torun, Gerhard Hobler, Tommaso Pregnolato, Tim Schröder, Katja Höflich   +10 more
wiley   +1 more source

Fluence and polarisation dependence of GaAs based Lateral Photo-Dember terahertz emitters

, 2014
We characterise THz output of lateral photo-Dember (LPD) emitters based on semi-insulating (SI), unannealed and annealed low temperature grown (LTG) GaAs.
Apostolopoulos, V., Barnes, M.E., Beere, H.E., Berry, S.A., Gow, P., McBryde, D., Ritchie, D.A.   +6 more
core   +1 more source

Fast detector of the ellipticity of infrared and terahertz radiation based on HgTe quantum well structures [PDF]

, 2008
We report a fast, room temperature detection scheme for the polarization ellipticity of laser radiation, with a bandwidth that stretches from the infrared to the terahertz range. The device consists of two elements, one in front of the other, that detect
A. F. G. van der Meer, Asnin V. M., Asnin V. M., B. Murdin, B. Wittmann, Born M., E. V. Beregulin, Edwards T., Ganichev S. D., Ivchenko E. L., Ivchenko E. L., Ivchenko E. L., L. E. Golub, N. N. Mikhailov, N. Q. Vinh, P. Olbrich, S. A. Dvoretsky, S. D. Ganichev, S. N. Danilov, V. A. Shalygin, W. Eder, W. Prettl, Woolard D. L., Z. D. Kvon   +23 more
core   +3 more sources

A Real-Time Terahertz Time-Domain Polarization Analyzer with 80-MHz Repetition-Rate Femtosecond Laser Pulses

Sensors, 2013
We have developed a real-time terahertz time-domain polarization analyzer by using 80-MHz repetition-rate femtosecond laser pulses. Our technique is based on the spinning electro-optic sensor method, which we recently proposed and demonstrated by using a
Takehiro Tachizaki, Takeshi Suzuki, Masatoshi Takeda, Kenichi Oguchi, Naoya Yasumatsu, Shinichi Watanabe   +5 more
doaj   +1 more source

Study on the laser-induced damage of thin films by terahertz time-domain spectroscopy

Frontiers in Physics, 2022
The undamaged and damaged areas of the ITO thin film deposited on a silicon substrate induced by laser with different energies were tested with the transmission terahertz time-domain spectroscopy system.
Xiaoyan Shang, Wei Shi, Junhong Su, Chengang Dong   +3 more
doaj   +1 more source

Chiral Acoustic Phonon and Conservation of Pseudoangular Momentum in α‐Quartz

Advanced Materials, EarlyView.
Chiral acoustic phonons in α‐quartz are probed via Brillouin light scattering, exploiting the photon's helicity and the crystal's handedness. The interaction obeys a selection rule arising from pseudoangular momentum conservation, enabling direct optical access to phonon chirality in nonsymmorphic crystals.
Changsoo Kim, In‐Kook Hwang, Kyoung‐Woong Moon, Kyongmo An, Kyung‐Jin Lee, Jae‐Hyeon Ko, Byong‐Guk Park, Kwang‐Yong Choi, Chanyong Hwang   +8 more
wiley   +1 more source

High-resolution THz gain measurements in optically pumped ammonia [PDF]

, 2018
This study is aimed at the evaluation of THz gain properties in an optically pumped NH3 gas. NH3 molecules undergo rotational-vibrational excitation by mid-infrared (MIR) optical pumping provided by a MIR quantum cascade laser (QCL) which enables precise
Eliet, Sophie, Lampin, Jean-François, Margules, Laurent, Mičica, Martin, Motiyenko, Roman, Pienkina, Anastasia, Pištora, Jaromír, Postava, Kamil, Vanwolleghem, Mathias   +8 more
core   +3 more sources

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

THz generation using a reflective stair-step echelon

, 2015
We present a novel method for THz generation in lithium niobate using a reflective stair-step echelon structure. The echelon produces a discretely tilted pulse front with less angular dispersion compared to a high groove-density grating.
Huang, W. Ronny, Nelson, Keith A., Ofori-Okai, Benjamin K., Sivarajah, Prasahnt   +3 more
core   +1 more source