Results 71 to 80 of about 263,956 (158)

Birefringence and Anisotropy of the Losses Due to Two-Photon Absorption of Femtosecond Pulses in Crystals

Photonics
It is shown that the two-photon absorption (TPA)-induced losses in a non-centrosymmetric crystal reduce considerably when the angle θ between the polarization vector of incident radiation and the optical c-axis is 45°.
Valeri Kovalev, George Krasin
doaj   +1 more source

Two-Photon-Excited Fluorescence-Encoded Infrared Spectroscopy

, 2016
We report on a method for performing ultrafast infrared (IR) vibrational spectroscopy using fluorescence detection. Vibrational dynamics on the ground electronic state driven by femtosecond mid-infrared pulses are detected by changes in fluorescence ...
Joseph N. Mastron (1871125), Andrei Tokmakoff (1290270)   +1 more
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The theoretical investigation of the impact of two-photon absorption and free-carrier absorption on phase-sensitive amplification in silicon waveguides

, 2016
We investigate the influence of two-photon absorption (TPA) and free-carrier absorption (FCA) on phase-sensitive amplification (PSA) process in a dispersion engineered silicon strip waveguide at the telecom wavelengths. The phase-dependent gain and phase-
Ma, Yonghua, Huang, Nan, Wang, Zhaolu, Liu, HJ (reprint author), Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian, Peoples R China., Liu, Hongjun, Sun, Qibing   +5 more
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Photoswitching of the Two‐Photon Absorption of Donor‐Acceptor Substituted Dithienylethenes

ChemistryEurope
In this work the structural and electronic integration of push–pull systems with photoactivatable dithienylethenes (DTEs) is demonstrated. The light‐induced 6π‐electrocyclization of two asymmetrically substituted DTEs is used to conjugate an electron ...
Francisco G. Blandón‐Cumbreras, Marc Villabona, Julia Osmólska, Elizaveta F. Petrusevich, David B. Guzmán Ríos, Robert Zaleśny, Joanna Olesiak‐Bańska, Jordi Hernando, Uwe Pischel   +8 more
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Measurement and application of optical nonlinearities in indium phosphide, cadmium mercury telluride and photonic crystal fibres

, 2009
The two-photon absorption (TPA) coefficient is measured in indium phosphide (InP) using femtosecond pulses to be 45cm/GW at 1.32μm. Nanosecond pulses are subsequently used to find the free-carrier refractive index cross-section, σ_r, and the free-carrier
Sloanes, Trefor J.
core  

Two-Photon-Active Organotin(IV) Complexes for Antibacterial Function and Superresolution Bacteria Imaging

, 2018
Antibacterial agents with two-photon absorption are expected to play a significant role in biomedical science. Herein, two novel organotin complexes, HLSn1 and HLSn2, based on coumarin were designed, synthesized, and systematically investigated.
Yu Shen (10486), Xiaohe Tian (1300929), Yupeng Tian (547920), Hui Wang (30400), Hongping Zhou (547918), Jieying Wu (547919), Lei Hu (316011), Qiong Zhang (172309), Tingting Xia (1741252), Bin Fang (251525)   +9 more
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Strong modulation instability in a silicon–organic hybrid slot waveguide

, 2015
In this paper, we investigate the strong modulation instability (MI) at telecommunication band in a silicon-organic hybrid slot waveguide. The organic material of polymer poly (bis para-toluene sulfonate) of 2, 4-hexadiyne 1, 6 diol (PTS), which has high
Kang, Z, Yan, B, Wu, Q, Zhang, Xianting, Yu, Chongxiu, Farrell, G, Yan, Binbin, Yuan, Jinhui, Zhang, X, Wu, Qiang, Yu, C, Wang, K, Sang, X, Yuan, J, Wang, Kuiru, Farrell, Gerald, Sang, Xinzhu, Kang, Zhe   +17 more
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Two-Photon Absorption in Graphene Enhanced by the Excitonic Fano Resonance

, 2015
We report our observation of two-photon absorption (2PA) in graphene enhanced by the excitonic Fano resonance at the saddle point with femtosecond laser pulses in the spectral range from 1.8 to 2.9 eV (or, from 435 to 700 nm).
Yu Wang (12152), Wang, Yu, Chen, Weiqiang, Weiqiang Chen (164339), Ji, Wei, Wei Ji (15028)   +5 more
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Two-Photon Absorption and Saturable Absorption of Mid-IR in Graphene

, 2018
We report on the response of graphene to high intensity mid-IR radiation and show that graphene exhibits saturable absorption and significant two-photon absorption in the spectral region from 1.55 $\mu$m to 3.50 $\mu$m (0.35 eV to 0.80 eV).
David J. Ottaway (14381877), Sze Yun Set (14389728), Shinji Yamashita (2233261), Andrew Malouf (17495730), Ori Henderson-Sapir (14381874)   +4 more
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On the Theory of Interband Two-Photon Absorption of Light in Semiconductors. Accounting Admixtures to the States of the Conduction Band and Valence States, the Rabi Effect

East European Journal of Physics
We present a theoretical study of interband two‐photon (two‐quantum) absorption of polarized light in semiconductors of cubic and tetrahedral symmetry.
Rustam Y. Rasulov, Vokhob Rasulov, Forrukh U. Kasimov, Mardonbek Kh. Nasirov, Islam E. Farmanov   +4 more
doaj   +1 more source