Nonlinear optical response in Kronig–Penney type graphene superlattice in terahertz regime

2015 ◽  
Vol 29 (13) ◽  
pp. 1550060 ◽  
Author(s):  
Lijuan Jiang ◽  
Rui-Yang Yuan ◽  
Xin Zhao ◽  
Jing Lv ◽  
Hui Yan
Keyword(s):  
Low Temperature ◽  
External Field ◽  
Nonlinear Optical ◽  
Low Frequency ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Nonlinear Responses ◽  
Graphene Superlattice ◽  
Fifth Order ◽  
Optoelectronics Devices

The terahertz nonlinear optical response in Kronig–Penney (KP) type graphene superlattice is demonstrated. The single-, triple- and quintuple-frequencies of the fifth-order nonlinear responses are investigated for different frequencies and temperatures with the angle φ along the periodicity of the superlattice toward the external field tuning from 0 to π/2. The results show that the fifth-order nonlinear optical conductance of graphene superlattice is enhanced in the terahertz regime when φ = 0, i.e. an external field is applied along the periodicity of the superlattice. The fifth-order nonlinear optical conductances at φ = 0 for different frequencies and temperatures are calculated. The results show that the nonlinear optical conductance is enhanced in low frequency and low temperature. Our results suggest that KP type graphene superlattices are preferred structures for developing graphene-based nonlinear photonics and optoelectronics devices.

NONLINEAR RESPONSE INDUCED STRONG ABSORPTANCE OF GRAPHENE IN THE TERAHERTZ REGIME

2010 ◽  
Vol 24 (21) ◽  
pp. 2243-2249 ◽  
Author(s):  
X. G. XU ◽  
J. C. CAO
Keyword(s):  
Nonlinear Optical ◽  
Low Frequency ◽  
Single Layer ◽  
Optical Response ◽  
Optoelectronic Device ◽  
Nonlinear Optical Response ◽  
Single Layer Graphene ◽  
Dirac Fermions ◽  
Layer Graphene ◽  
Fifth Order

We have calculated the fifth-order nonlinear optical response at experimentally relevant field strengths within the model of massless Dirac fermions by coupling the massless Dirac fermions to the time-dependent electric field quantum mechanically. It demonstrates that the fifth-order nonlinear optical response plays an important role in the contribution to the optical conductivity of pristine single-layer graphene in the low frequency part of the terahertz regime. The nonlinear effect can enhance the optical activity of single-layer graphene in the terahertz regime and significantly decreases the transmittance of graphene in the regime of frequencies from 0.1 to 0.5 THz. These properties of graphene may be used for photonic and optoelectronic device in the terahertz regime.

Third- and Fifth-Order Nonlinear Optical Response of a TICT/Stilbene Hybrid Chromophore

2020 ◽  
Vol 124 (9) ◽  
pp. 5363-5370 ◽  
Author(s):  
Alexander J.-T. Lou ◽  
Sepehr Benis ◽  
Munan Gao ◽  
Alexander Baev ◽  
David Kim ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Fifth Order

Second-order nonlinear optical response of phenyl-substituted cationic BIS-cyclometalated iridium(III) complexes: Effect of different position

2018 ◽  
Vol 17 (05) ◽  
pp. 1850033 ◽  
Author(s):  
Hui-Ying Wang ◽  
Li-Xue Jing ◽  
Jin-Ting Ye ◽  
Hong-Qiang Wang ◽  
Yong-Qing Qiu
Keyword(s):  
Density Functional ◽  
Nonlinear Optical ◽  
Energy Gap ◽  
Low Frequency ◽  
Dft Method ◽  
Optical Response ◽  
Second Order ◽  
Nonlinear Optical Response ◽  
Iridium Complexes ◽  
First Hyperpolarizability

In this paper, a series of cationic iridium complexes [(2-phenylpyridine)2(2,2[Formula: see text]-bipyridine)Ir][Formula: see text] which substituted phenyl on different ligands position have been systematically investigated by density functional theory (DFT) method. Significantly, the first hyperpolarizability [Formula: see text] values can be enhanced by introducing phenyl on 2-phenylpyridine ligands R1 or R2, whereas substituting phenyl on 2,2[Formula: see text]-bipyridine ligands R3 result in a decreasing [Formula: see text] values. The [Formula: see text] values exhibit obvious connection with the corresponding HOMO and LUMO energy gap. Furthermore, the time-dependent (TD) DFT calculations suggest that the enhanced [Formula: see text] values are related to obvious charge transfer from 2-phenylpyridine ligands to 2,2[Formula: see text]-bipyridine ligands. The investigation of frequency-dependent first hyperpolarizability [Formula: see text] ([Formula: see text]; [Formula: see text], 0) and [Formula: see text] ([Formula: see text]; [Formula: see text], [Formula: see text]) shown less dispersion effect at the low-frequency region for all of the studied complexes. Overall, tuning phenyl on the different ligands position can be seen as an effective strategy to modulate the second-order nonlinear optical response for these iridium complexes, which is benefit to theoretical and experimental further investigation.

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.

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