Results 111 to 120 of about 19,972 (281)

Background–limited long wavelength infrared InAs/InAs1− xSbx type-II superlattice-based photodetectors operating at 110 K

APL Materials, 2017
We report the demonstration of high-performance long-wavelength infrared (LWIR) nBn photodetectors based on InAs/InAs1− xSbx type-II superlattices.
Abbas Haddadi, Arash Dehzangi, Sourav Adhikary, Romain Chevallier, Manijeh Razeghi   +4 more
doaj   +1 more source

Scanning tunneling microscopy of lnAs/GaSb superlattices: Subbands, interface roughness, and interface asymmetry [PDF]

, 1994
Scanning tunneling microscopy and spectroscopy is used to characterize InAs/GaSb superlattices, grown by molecular-beam epitaxy. Roughness at the interfaces between InAs and GaSb layers is directly observed in the images, and a quantitative spectrum of ...
Collins, D. A., Feenstra, R. M., McGill, T. C., Ting, D. Z.-Y., Wang, M. W.   +4 more
core  

Diffuse Neutron Scattering Study of Magnetic Correlations in half-doped La0.5Ca0.5-xSrxMnO3 (x = 0.1, 0.3 and 0.4) Manganites

, 2010
The short range ordered magnetic correlations have been studied in half doped La0.5Ca0.5-xSrxMnO3 (x = 0.1, 0.3 and 0.4) compounds by polarized neutron scattering technique.
A. Das, A. Kumar, A. Radulescu, C. N. R. Rao, I. Dhiman, J. Schweizer, L. M. Rao, R. Mittal, T. Ersez, Y. Su   +9 more
core   +1 more source

Accelerating Luminescence in Nanostructures: Exploring the Physical Limits and Impact of Ultrafast Emission in Nanoscale Materials

Advanced Photonics Research, EarlyView.
This review highlights recent advances in accelerating luminescence in nanostructures through cooperative emission, resonator coupling, and nonlocal light–matter interactions. By unifying concepts such as excitonic superradiance, superfluorescence, and the plasmonic Purcell effect, it reveals physical limits of ultrafast emission and their potential ...
Masaaki Ashida, Koichi Okamoto, Takuya Matsuda, Hajime Ishihara   +3 more
wiley   +1 more source

Revisiting the Zinc-Blende/Wurtzite Heterocrystalline Structure in CdS

Advances in Condensed Matter Physics, 2014
The band offset at CdS zinc-blende (ZB)/wurtzite (WZ) heterocrystalline interface was revisited using the first principles calculations with the local density approximation (LDA), generalized gradient approximation (GGA), and Heyd-Scuseria-Ernzerhof ...
Zhaohui Zhou, Mingtao Li, Po Wu, Liejin Guo   +3 more
doaj   +1 more source

Stabilization of highly polar BiFeO$_3$-like structure: a new interface design route for enhanced ferroelectricity in artificial perovskite superlattices

, 2016
In ABO3 perovskites, oxygen octahedron rotations are common structural distortions that can promote large ferroelectricity in BiFeO3 with an R3c structure [1], but suppress ferroelectricity in CaTiO3 with a Pbnm symmetry [2].
Chen, Mohan, Lee, Ho Nyung, Miller, Dean J., Rabe, Karin M., Wang, Hongwei, Wen, Jianguo, Wu, Xifan, Zhou, Qibin   +7 more
core   +2 more sources

Bound States in the Continuum in Metasurface Absorbers: A Comparison with Metasurfaces

Advanced Photonics Research, EarlyView.
Bound states in the continuum (BICs) offer a powerful mechanism for enhancing light–matter interactions. This work systematically investigates the radiation characteristics of BICs under both transmission and reflection configurations using multipolar analysis.
Guizhen Xu, Zhanqiang Xue, Jiang Du, Longqing Cong   +3 more
wiley   +1 more source

Optical Characterization of the Interband Cascade LWIR Detectors with Type-II InAs/InAsSb Superlattice Absorber

Nanomaterials
The long-wave infrared (LWIR) interband cascade detector with type-II superlattices (T2SLs) and a gallium-free (“Ga-free”) InAs/InAsSb (x = 0.39) absorber was characterized by photoluminescence (PL) and spectral response (SR) methods.
Krzysztof Murawski, Kinga Majkowycz, Małgorzata Kopytko, Tetiana Manyk, Karol Dąbrowski, Bartłomiej Seredyński, Łukasz Kubiszyn, Piotr Martyniuk   +7 more
doaj   +1 more source

Temperature-Dependent X-ray Diffraction Measurements of Infrared Superlattices Grown by MBE

Crystals, 2016
Strained-layer superlattices (SLSs) are an active research topic in the molecular beam epitaxy (MBE) and infrared focal plane array communities. These structures undergo a >500 K temperature change between deposition and operation.
Charles J. Reyner, Arnold M. Kiefer, Gamini Ariyawansa, Joshua M. Duran, John E. Scheihing   +4 more
doaj   +1 more source

Surface Charge Density Wave Transition in NbSe$_3$

, 2010
The two charge-density wave (CDW) transitions in NbSe$_3$ %at wave numbers at $\bm{q_1}$ and $\bm{q_2}$, occurring at the surface were investigated by scanning tunneling microscopy (STM) on \emph{in situ} cleaved $(\bm{b},\bm{c})$ plane.
Brazovskii, Serguei, Brun, Christophe, Monceau, Pierre, Wang, Zhao-Zhong   +3 more
core   +3 more sources