Multi-photon absorption and nonlinear refraction of GaAs in the mid-infrared

2006 ◽  
Author(s):  
W.C. Hurlbut ◽  
K.L. Vodopyanov ◽  
P.S. Kuo ◽  
M.M. Fejer ◽  
Yun-Shik Lee
Keyword(s):  
Nonlinear Refraction ◽  
Photon Absorption ◽  
Mid Infrared

scholarly journals Tunable Nonlinear Optical Property of MnS Nanoparticles with Different Size and Crystal Form

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 34
Author(s):  
Zhihao Zhang ◽  
Pengchao Li ◽  
Yuzong Gu
Keyword(s):  
Optical Property ◽  
Nonlinear Optical ◽  
Nonlinear Optical Property ◽  
Nonlinear Refraction ◽  
Synthesis Method ◽  
Crystal Form ◽  
Optical Nonlinearity ◽  
Photon Absorption ◽  
Third Order ◽  
Crystal Forms

It is significant to study the reason that semiconductor material has adjustable third-order optical nonlinearity through crystal form and dimensions are changed. αMnS nanoparticles with different crystal forms and sizes were successfully prepared by one-step hydrothermal synthesis method and their size-limited third-order nonlinear optical property was tested by Z-scan technique with 30 ps laser pulses at 532 nm wavelength. Nanoparticles of different crystal forms exhibited different NLO (nonlinear optical) responses. γMnS had stronger NLO response than αMnS because of higher fluorescence quantum yield. Two-photon absorption and the nonlinear refraction are enhanced as size of nanoparticlesreduced. The nanoparticles had maximum NLO susceptibility which was 3.09 × 10−12 esu. Susceptibility of αMnS increased about nine times than that of largest nanoparticles. However, it was reduced when size was further decreased. This trend was explained by the effects of light induced dipole moments. And defects in αMnS nanoparticles also had effect on this nonlinear process. MnS nanoparticles had potential application value in optical limiting and optical modulation.

Kerr nonlinearity and multi-photon absorption in germanium at mid-infrared wavelengths

2017 ◽  
Vol 111 (9) ◽  
pp. 091902 ◽  
Author(s):  
B.-U. Sohn ◽  
C. Monmeyran ◽  
L. C. Kimerling ◽  
A. M. Agarwal ◽  
D. T. H. Tan
Keyword(s):  
Kerr Nonlinearity ◽  
Photon Absorption ◽  
Mid Infrared ◽  
Infrared Wavelengths

Two-Photon Absorption, Nonlinear Refraction and Optical Limiting in Semiconductors

2008 ◽  
pp. 404-404-20 ◽  
Author(s):  
EW Van Stryland ◽  
H Vanherzeele ◽  
MA Woodall ◽  
MJ Soileau ◽  
AL Smirl ◽  
...  
Keyword(s):  
Nonlinear Refraction ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

scholarly journals The Influence of Quantum Confinement on Third-Order Nonlinearities in Porous Silicon Thin Films

2018 ◽  
Vol 8 (10) ◽  
pp. 1810 ◽  
Author(s):  
Rihan Wu ◽  
Jack Collins ◽  
Leigh Canham ◽  
Andrey Kaplan
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Quantum Confinement ◽  
Nonlinear Refraction ◽  
Photon Absorption ◽  
Third Order ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Silicon Thin Films ◽  
Gaussian Decomposition

We present an experimental investigation into the third-order nonlinearity of conventional crystalline (c-Si) and porous (p-Si) silicon with Z-scan technique at 800-nm and 2.4- μ m wavelengths. The Gaussian decomposition method is applied to extract the nonlinear refractive index, n 2 , and the two-photon absorption (TPA) coefficient, β , from the experimental results. The nonlinear refractive index obtained for c-Si is 7 ± 2 × 10 − 6 cm 2 /GW and for p-Si is − 9 ± 3 × 10 − 5 cm 2 /GW. The TPA coefficient was found to be 2.9 ± 0.9 cm/GW and 1.0 ± 0.3 cm/GW for c-Si and p-Si, respectively. We show an enhancement of the nonlinear refraction and a suppression of TPA in p-Si in comparison to c-Si, and the enhancement gets stronger as the wavelength increases.

Light-matter Interaction Under Intense Field Conditions: Nonlinear Optical Properties of Metallic-dielectric Nanostructures

2019 ◽  
Vol 4 (1) ◽  
pp. 51-62
Author(s):  
Enza Fazio ◽  
Luisa D'Urso ◽  
Rosalba Saija ◽  
Saveria Santangelo ◽  
Fortunato Neri
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Refraction ◽  
Optical Limiting ◽  
Nonlinear Optical Properties ◽  
Hybrid Nanostructures ◽  
Field Conditions ◽  
Photon Absorption ◽  
Noble Metal Nanoparticles ◽  
Intense Field

Background: Metallic–dielectric plasmonic nanoparticles have recently aroused great interest in view of many and novel technological applications, based on the interaction between light and matter under intense field conditions, in nonlinear integrated photonics and opto-fluidics, thanks to the possibility of tuning their electronic and optical properties through a fine control of the synthesis parameters and their nanoparticles under a high-power laser, like the one used during z-scan measures. Objective: The goal of this work is the study of nonlinear optical properties (as nonlinear refraction, scattering, two-photon absorption, optical limiting) of colloids synthesized in different liquid media by Pulsed laser ablation in liquids (PLAL), which is a photo-assisted synthesis technique ensuring the formation of stable, contaminant-free colloids directly during the ablation process. Methods: Noble metal nanoparticles, metal oxides hybrid nanostructures and silicon-based nanomaterials, were prepared by nanosecond and picosecond PLAL technique, in different media. The third-order nonlinear optical (NLO) properties have been studied by the use of a single beam z-scan technique with Q-switched frequency doubled Nd:YAG laser (λ=532 nm) at 5 ns pulse. Results: 1) A good stability of the PLAL nanocolloids under a high laser power; 2) the limiting threshold reduction inducted by the Ag-Au nanoparticles, the increase of the NLO absorption coefficient β, the reduction of the transmittance/scattering signal and the presence of a pronounced asymmetry of the peak/valley profile of the metal decorated metal oxide nanomaterials compared to the separately produced components. Conclusion: An intriguing coupling between the nature of the optical limiting response and the nanostructures rearrangement upon intense field conditions, explaining z-scan data by a classical approach able to account for the nanoparticles asymmetry and plasmonic effects, are the main results found.

Application of mid-infrared free-electron laser for structural analysis of biological materials

2021 ◽  
Vol 28 (1) ◽  
pp. 28-35
Author(s):  
Takayasu Kawasaki ◽  
Heishun Zen ◽  
Kento Ozaki ◽  
Hironari Yamada ◽  
Kazumasa Wakamatsu ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Free Electron ◽  
Free Electron Laser ◽  
Structural Changes ◽  
Far Infrared ◽  
Biological Materials ◽  
Infrared Region ◽  
Photon Absorption ◽  
Mid Infrared ◽  
Structural Evaluation

A mid-infrared free-electron laser (MIR-FEL) is a synchrotron-radiation-based femto- to pico-second pulse laser. It has unique characteristics such as variable wavelengths in the infrared region and an intense pulse energy. So far, MIR-FELs have been utilized to perform multi-photon absorption reactions against various gas molecules and protein aggregates in physical chemistry and biomedical fields. However, the applicability of MIR-FELs for the structural analysis of solid materials is not well recognized in the analytical field. In the current study, an MIR-FEL is applied for the first time to analyse the internal structure of biological materials by using fossilized inks from cephalopods as the model sample. Two kinds of fossilized inks that were collected from different strata were irradiated at the dry state by tuning the oscillation wavelengths of the MIR-FEL to the phosphoryl stretching mode of hydroxyapatite (9.6 µm) and to the carbonyl stretching mode of melanin (5.8 µm), and the subsequent structural changes in those materials were observed by using infrared microscopy and far-infrared spectroscopy. The structural variation of these biological fossils is discussed based on the infrared-absorption spectral changes that were enhanced by the MIR-FEL irradiation, and the potential use of MIR-FELs for the structural evaluation of biomaterials is suggested.

Measurements of nonlinear refraction in the mid-infrared materials ZnGeP2 and AgGaS2

2017 ◽  
Vol 123 (3) ◽  
Author(s):  
Wenkai Li ◽  
Yanyan Li ◽  
Yi Xu ◽  
Jun Lu ◽  
Pengfei Wang ◽  
...  
Keyword(s):  
Nonlinear Refraction ◽  
Mid Infrared ◽  
Infrared Materials
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