Results 231 to 240 of about 465,453 (325)

Diameter Dependence of Light Absorption in GaAs Nanowires Evidenced by Photoluminescence Spectroscopy

Advanced Optical Materials, EarlyView.
Photoluminescence spectroscopy is introduced as a qualitative method to probe light absorption in highly phase‐pure GaAs nanowire arrays and single nanowires, for which direct absorption measurements are challenging. Using defect‐line saturation and the exciton‐to‐plasma transition as indicators for the density of photogenerated charge carriers, a ...
Francisca Marín, Ijaas Mohamed, Oliver Brandt, Lutz Geelhaar   +3 more
wiley   +1 more source

New optical fibres for high-capacity optical communications. [PDF]

Philos Trans A Math Phys Eng Sci, 2016
Richardson DJ.
europepmc   +1 more source

Probing Ultrafast Coherent Bandgap Modulation in Monolayer WSe2 by Nonlinear Optics

Advanced Optical Materials, EarlyView.
This work sheds light on how resonant nonlinear optics blursthe line between perturbative and non‐perturbative nonlinear optics. Measured deviationsfrom the quadratic second‐harmonic scaling near the excitonic resonance arisefrom optical Stark and Bloch‐Siegert shifts. The experimental results arefurther underpinned by analytical and numerical analysis
Sebastian Klimmer, Thomas Lettau, Laura Valencia Molina, Daniil Kartashov, Ulf Peschel, Jan Wilhelm, Dragomir Neshev, Giancarlo Soavi   +7 more
wiley   +1 more source

Spectroscopic Ellipsometry Characterization and Radiative Limit Modeling of Bismuth‐Based Perovskite‐Inspired Absorbers for Indoor Photovoltaics

Advanced Optical Materials, EarlyView.
This study determines the optical constants of two lead‐free perovskite‐inspired materials (PIMs), Cu2AgBiI6 and Cs3Bi2I6Br3, promising for indoor light conversion. The optical constants are applied to simulate photovoltaic device optics, and thereupon, revise the theoretical limits for photocurrent generation and power conversion efficiency, providing
Aleksi Kamppinen, G. Krishnamurthy Grandhi, Mahboubeh Hadadian, Sami Toikkonen, Sirius Yli‐Paavola, Paola Vivo, Kati Miettunen   +6 more
wiley   +1 more source

Adaptive free-space optical communications through turbulence using self-healing Bessel beams. [PDF]

Sci Rep, 2017
Li S, Wang J.
europepmc   +1 more source

Functional-Link Neural Network for Nonlinear Equalizer in Coherent Optical Fiber Communications [PDF]

, 2019
Jing Zhang, Pingping Lei, Shaohua Hu, Mingyue Zhu, Zhenming Yu, Bo Xu, Kun Qiu   +6 more
openalex   +1 more source

Quasi‐Bound States in the Continuum on the Bloch‐Surface‐Wave Platform for Sensing With Simultaneous High Q‐Factor and High Sensitivity

Advanced Optical Materials, EarlyView.
Quasi‐bound states in the continuum on the Bloch surface wave platform are demonstrated, exhibiting high Q‐factors due to strongly suppressed radiative losses and high sensitivity arising from the large evanescent field inherent to the surface wave. The resonance shows clear shifts after each surface molecular functionalization step, highlighting its ...
Bo‐Wei Lin, Mu‐Hsin Chen, Yang‐Chun Lee, Tang Dang, Di Xing, Hiroaki Matsui, Jean‐Jacques Delaunay   +6 more
wiley   +1 more source

NASA's Optical Communications Program for 2015 and Beyond [PDF]

, 2015
Donald M. Cornwell
openalex  

Ultrabroadband Excitation of Hot Carriers in Plasmonic Nanorods Revealed by Two‐Dimensional Electronic Spectroscopy

Advanced Optical Materials, EarlyView.
This work dissects the ultrafast response of polydisperse plasmonic nanorods using two‐dimensional electronic spectroscopy, uniquely combining temporal and spectral resolution. Our ultrabroadband pulses cover both transverse and longitudinal nanorods’ resonances, revealing sub‐200‐fs dynamics and distinct broadening mechanisms.
Andrea Schirato, Mattia Russo, Luca Moretti, Alessandro Molinelli, Laura Polito, Filippo Rossi, Giulio Cerullo, Giuseppe Della Valle, Margherita Maiuri   +8 more
wiley   +1 more source

Orbital Angular Momentum-based Space Division Multiplexing for High-capacity Underwater Optical Communications. [PDF]

Sci Rep, 2016
Ren Y, Li L, Wang Z, Kamali SM, Arbabi E, Arbabi A, Zhao Z, Xie G, Cao Y, Ahmed N, Yan Y, Liu C, Willner AJ, Ashrafi S, Tur M, Faraon A, Willner AE.   +16 more
europepmc   +1 more source