Nonlinear optical response of a glassy semiconductor illuminated near its fundamental absorption band edge

2017 ◽  
Author(s):  
G. N. Vasilyev ◽  
S. A. Evseyko ◽  
E. A. Romanova
Keyword(s):  
Absorption Band ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Band Edge ◽  
Absorption Band Edge ◽  
Fundamental Absorption Band ◽  
Glassy Semiconductor

scholarly journals Measurement of non-linear optical coefficients of chalcogenide glasses near the fundamental absorption band edge

2018 ◽  
Vol 480 ◽  
pp. 13-17 ◽  
Author(s):  
Elena Romanova ◽  
Yulia Kuzyutkina ◽  
Vladimir Shiryaev ◽  
Nabil Abdel-Moneim ◽  
David Furniss ◽  
...  
Keyword(s):  
Absorption Band ◽  
Chalcogenide Glasses ◽  
Band Edge ◽  
Absorption Band Edge ◽  
Fundamental Absorption Band ◽  
Non Linear ◽  
Linear Optical

scholarly journals Strong near band-edge excited second-harmonic generation from multilayer 2H Tin diselenide

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Rabindra Biswas ◽  
Medha Dandu ◽  
Asish Prosad ◽  
Sarthak Das ◽  
Sruti Menon ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Optical Response ◽  
Propagation Model ◽  
Nonlinear Optical Response ◽  
Band Edge ◽  
Near Band Edge ◽  
Nonlinear Wave Propagation

AbstractWe report strong second-harmonic generation (SHG) from 2H polytype of multilayer Tin diselenide (SnSe2) for fundamental excitation close to the indirect band-edge in the absence of excitonic resonances. Comparison of SHG and Raman spectra from exfoliated SnSe2 flakes of different polytypes shows strong (negligible) SHG and Raman Eg mode at 109 cm−1 (119 cm−1), consistent with 2H (1T) polytypes. The difference between the A1g–Eg Raman peak positions is found to exhibit significant thickness dependent for the 1T form, which is found to be absent for the 2H form. The observed thickness dependence of SHG with rapid oscillations in signal strength for small changes in flake thickness are in good agreement with a nonlinear wave propagation model considering nonlinear polarization with alternating sign from each monolayer. The nonlinear optical susceptibility extracted from SHG signal comparison with standard quartz samples for 1040 nm excitation is found to be more than 4-times higher than that at 1550 nm. This enhanced nonlinear response at 1040 nm is attributed to the enhanced nonlinear optical response for fundamental excitation close to the indirect band-edge. We also study SHG from heterostructures of monolayer MoS2/multilayer SnSe2 which allows us to unambiguously compare the nonlinear optical response of SnSe2 with MoS2. We find the SHG signal and any interference effect in the overlap region to be dominated by the SnSe2 layer for the excitation wavelengths considered. The comparison of SHG from SnSe2 and MoS2 underscores that the choice of the 2D material for a particular nonlinear optical application is contextual on the wavelength range of interest and its optical properties at those wavelengths. The present works further highlights the usefulness of near band-edge enhancement of nonlinear processes in emerging 2D materials towards realizing useful nanophotonic devices.

scholarly journals Nonlinear Optical Response of a WS2 Monolayer at Room Temperature upon Multicolor Laser Excitation

ACS Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 550-556
Author(s):  
Javier Hernandez-Rueda ◽  
Marc L. Noordam ◽  
Irina Komen ◽  
L. Kuipers
Keyword(s):  
Nonlinear Optical ◽  
Room Temperature ◽  
Laser Excitation ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Ws2 Monolayer

Broadband nonlinear optical response of graphdiyne for mid-infrared solid-state lasers

2021 ◽  
Vol 64 (9) ◽  
Author(s):  
MengYu Zong ◽  
YuQian Zu ◽  
Jia Guo ◽  
Zhen Zhang ◽  
JingJing Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Solid State Lasers ◽  
Mid Infrared

Competing hydrogen-bonding interactions in a high-Tc organic molecular-ionic crystal with evident nonlinear optical response

CrystEngComm ◽  
2021 ◽  
Vol 23 (13) ◽  
pp. 2509-2512
Author(s):  
Wen-Tao Xu ◽  
Jun-Chao Liu ◽  
Yu-Ling Zeng ◽  
Hua Zhang ◽  
Zhong-Xia Wang
Keyword(s):  
Phase Transition ◽  
Hydrogen Bonding ◽  
Ionic Crystal ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
High Tc ◽  
Hydrogen Bonding Interactions ◽  
Nlo Response

An organic molecular-ionic crystal of (TPPO–H)2SO4 exhibits moderate NLO response which is twice that of KDP and competing hydrogen-bonding interactions triggered high-Tc phase transition.

Manipulation of Ultrafast Nonlinear Optical Response Based on Surface Plasmon Resonance

2021 ◽  
pp. 2100847
Author(s):  
Yonglin He ◽  
Weimin Yang ◽  
Tien‐Mo Shih ◽  
Jingyu Wang ◽  
Dumeng Zhang ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response
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