Role of photo-assisted tunneling in time-dependent second-harmonic generation from Si surfaces with ultrathin oxides

2013 ◽  
Vol 102 (5) ◽  
pp. 051602 ◽  
Author(s):  
Yong Q. An ◽  
J. Price ◽  
Ming Lei ◽  
M. C. Downer
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Time Dependent ◽  
Ultrathin Oxides ◽  
Assisted Tunneling

Second Harmonic Generation-based Nonlinear Plasmonic RI-Sensing in Solution: Pivotal Role of Particle Size

2021 ◽  
Author(s):  
Mrigank Verma ◽  
Manabendra Chandra
Keyword(s):  
Particle Size ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Gold Nanorods ◽  
Second Harmonic ◽  
Solution Phase ◽  
Pivotal Role

Here, we demonstrate the utility of the second harmonic generation (SHG) for refractometric sensing in the solution phase. We employ an aqueous colloid of gold nanorods as our sensors and,...

SECOND ORDER NONLINEAR OPTICAL PROPERTIES IN SILICA-BASED GLASS FILM WAVEGUIDES

1996 ◽  
Vol 05 (02) ◽  
pp. 189-204 ◽  
Author(s):  
S. HORINOUCHI ◽  
H. IMAI ◽  
H. YAMASAKI ◽  
K. FUKAO ◽  
G.J. ZHANG ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Glass Composition ◽  
Second Harmonic ◽  
Optical Nonlinearity ◽  
Second Order ◽  
Time Dependent ◽  
Glass Film ◽  
Second Order Nonlinearity

Phase-matched blue second harmonic generation was observed in a corona-poled Corning 7059 glass film waveguide. The induced quadratic optical nonlinearity was examined by second harmonic generation with a time dependent decay for multi-complex of SiO 2, BaO,B 2 O 3 and/or Al 2 O 3. Glass films with every possible combination of composition were fabricated and examined, The glass composition of SiO 2- BaO-B 2 O 3 and/or SiO 2- BaO-Al 2 O 3 was found to play effective roles in maintaining the induced second order nonlinearity for a longer period of time. This is supposed to be related to distributed traps which come from complex of the glass components.

scholarly journals Metal-Free Perovskites for Non-Linear Optical Materials

2019 ◽  
Author(s):  
Thomas W. Kasel ◽  
Zeyu Deng ◽  
Austin Mroz ◽  
Christopher H. Hendon ◽  
Keith Butler ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
First Principles Calculations ◽  
Halide Anion ◽  
Metal Free ◽  
Organic Group ◽  
Nlo Response ◽  
Earth Abundant

<div> <div> <div> <p>We identify the existence of nonlinear optical (NLO) activity in a number of novel ABX3-type metal-free perovskites, where A is a highly tuneable organic cation, B is a NH4 cation and X a halide anion. Through systematic first-principles calculations, we identify important trends to chart the second-harmonic generation of this class of materials. We study three perovskites MDABCO- NH4 I3 , CNDABCO-NH4 I3 and ODABCO-NH4 I3 for use as deep-UV second-harmonic generation materials. We identify the role of the dipole moment imparted by the organic group on the A cation as an important parameter to tune the NLO properties of these materials. We apply this knowledge functionalising the organic group DABCO with the highly polar cyanide CN group, and we demonstrate a significant improvement of the NLO response in this family of materials. These findings can accelerate the application of metal free perovskites as inexpensive, non-toxic, earth-abundant materials for the next generation of optical communication applications. </p> </div> </div> </div>

Role of optical interference effects in the enhancement of magnetization-induced second-harmonic generation

1999 ◽  
Vol 68 (3) ◽  
pp. 537-543 ◽  
Author(s):  
T.V. Murzina ◽  
A.A. Fedyanin ◽  
T.V. Misuryaev ◽  
G.B. Khomutov ◽  
O.A. Aktsipetrov
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Interference Effects ◽  
Optical Interference

scholarly journals The Role of Surface Plasmon Resonance of Gold Nanoparticles for the Enhancement of Second Harmonic Generation of Nonlinear Chromophores

Inorganics ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 64 ◽  
Author(s):  
Anu Singh Bisht ◽  
Khuyen Hoang-Thi ◽  
Isabelle Ledoux-Rak ◽  
Hynd Remita ◽  
Frédéric Dumur ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Phenyl Ring ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Nlo Response ◽  
Spherical Gold Nanoparticles

A significant enhancement of the second harmonic generation (SHG) from second-order nonlinear optical (NLO) dyes in solution has been evidenced when these dyes were grafted onto the surface of spherical gold nanoparticles (AuNPs), as compared to their NLO response without AuNPs. The length, as well as the nature of the spacers between the gold particle and the chromophore, is shown to play an important role, a benzene linker being more favorable to AuNP-4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) interactions, as illustrated by a higher exaltation of the NLO response for DAST molecules linked to AuNP via a phenyl ring as compared to their equivalent with a CH2–CH2 link.

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