Results 81 to 90 of about 78,934 (289)

Robust Extraction of Hyperbolic Metamaterial Permittivity using Total Internal Reflection Ellipsometry.

ACS Photonics, 2018
Hyperbolic metamaterials are optical materials characterized by highly anisotropic effective permittivity tensor components having opposite signs along orthogonal directions.
Cheng Zhang, Cheng Zhang, N. Hong, Chengang Ji, Wenqi Zhu, Wenqi Zhu, Xi Chen, Amit Agrawal, Amit Agrawal, Zhong Zhang, T. Tiwald, Stefan Schoeche, J. Hilfiker, L. Guo, H. Lezec   +14 more
semanticscholar   +1 more source

Efficient Charge Transport in Zero‐Dimensional Perovskite for Ultrahigh‐Sensitivity X‐Ray Detection

Advanced Functional Materials, EarlyView.
A novel mono‐octahedral 0D Bi‐based Dpy3Bi2I12 perovskite strengthens the internal hydrogen bonds and forms a quasi‐2D lattice, exhibits exceptional charge transport and mobility, achieving high X‐ray sensitivity and ultralow‐dose imaging, and setting a new benchmark for 0D detector performance.
Xin Song, Lijie Wang, Jiayi Wang, Yafeng Xu, Renqian Zhou, Shulin Chen, Partha Maity, Peng Yuan, Yongcao Zhang, Bingyao Shao, Jian‐Xin Wang, Jun Yin, Ren‐Wu Huang, Youyou Yuan, Taimoor Ahmad, Osman M. Bakr, Omar F. Mohammed   +16 more
wiley   +1 more source

Electron effective mass in Al$_{0.72}$Ga$_{0.28}$N alloys determined by mid-infrared optical Hall effect

, 2013
The effective electron mass parameter in Si-doped Al$_{0.72}$Ga$_{0.28}$N is determined to be $m^\ast=(0.336\pm0.020)\,m_0$ from mid-infrared optical Hall effect measurements.
A. Kakanakova-Georgieva, D. Nilsson, E. Janzén, M. Schubert, P. Kühne, Pidgeon C., S. Schöche, Schubert M., T. Hofmann, V. Darakchieva   +9 more
core   +2 more sources

Self‐Hybridized Exciton‐Polariton Photodetectors From Layered Metal‐Organic Chalcogenolates

Advanced Functional Materials, EarlyView.
Self‐hybridized exciton‐polariton photodetectors are demonstrated using high refractive index mithrene, eliminating the need for top mirrors. This simplified architecture enables tunable sub‐bandgap photodetection via lower exciton‐polariton states and enhanced carrier transport through ultrafast polariton group velocities.
Bongjun Choi, Adam D. Alfieri, Wangleong Chen, Deep Jariwala   +3 more
wiley   +1 more source

Regime Map of the Effective Medium Approximation Modelling of Micro-Rough Surfaces in Ellipsometry

Sensors
In this work, we discuss the precision of the effective medium approximation (EMA) model in the data analysis of spectroscopic ellipsometry (SE) for solid materials with micro-rough surfaces by drawing the regime map. The SE parameters ψ (amplitude ratio)
Meijiao Huang, Liang Guo, Fengyi Jiang
doaj   +1 more source

Optical transitions in hybrid perovskite solar cells: Ellipsometry, density functional theory, and quantum efficiency analyses for CH3NH3PbI3 [PDF]

, 2015
We report artifact-free CH3NH3PbI3 optical constants extracted from ultra-smooth perovskite layers without air exposure and assign all the optical transitions in the visible/ultraviolet region unambiguously based on density functional theory (DFT ...
M. Shirayama, Hideyuki Kadowaki, T. Miyadera, T. Sugita, Masato Tamakoshi, Masato Kato, Takemasa Fujiseki, D. Murata, S. Hara, T. Murakami, S. Fujimoto, M. Chikamatsu, H. Fujiwara   +12 more
semanticscholar   +1 more source

Voltage‐Gated Dedoping of n‐Doped Poly(benzodifurandione) as an Interfacial Protective Mechanism in Electrochromic Devices

Advanced Functional Materials, EarlyView.
Electrochromic polymer stability under overpotential is improved by inserting an ultrathin, transparent n‐doped poly(benzodifurandione) interlayer between indium tin oxide and a poly(3,4‐propylenedioxythiophene)‐based electrochromic polymer. The interlayer supports rapid switching at operating bias, then becomes resistive near +0.8 V to suppress excess
Priyanka Rout, Palak Mehra, Won‐June Lee, Liyan You, Jianguo Mei   +4 more
wiley   +1 more source

Dynamical response and confinement of the electrons at the LaAlO3/SrTiO3 interface

, 2009
With infrared ellipsometry and transport measurements we investigated the electrons at the interface between LaAlO3 and SrTiO3. We obtained a sheet carrier density of Ns~5-9x 10E13 cm^-2, an effective mass of m*~3m_e, and a strongly frequency dependent ...
Barthelemy, A., Bernhard, C., Bibes, M., Copie, O., Dubroka, A., Herranz, G., Kim, K. W., Malik, V. K., Mannhart, J., Roessle, M., Schneider, C. W., Schulz, L., Thiel, S.   +12 more
core   +2 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

Ordered arrays of metal nanostructures on insulator/metal film: dependence of plasmonic properties on lattice orientation

Nano Express
We study the dependence of the optical response of square lattices of plasmonic nanoparticles on the mutual orientation of the lattice and the plane of incidence of illuminating light.
Eugene Bortchagovsky, Fang Dai, Jia Tang, Ralfy Kenaz, Ilya Milekhin, Yurii Demydenko, Alla Bogoslovska, Pierre-Michel Adam, Ronen Rapaport, Monika Fleischer, Dietrich R T Zahn   +10 more
doaj   +1 more source