scholarly journals Measurement System of Crystal Quality and Nonlinear Coefficient Based on Phase-Mismatched Second Harmonic Generation

2017 ◽  
Vol 45 (12) ◽  
pp. 773
Author(s):  
Mio KOYAMA
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Measurement System ◽  
Second Harmonic ◽  
Nonlinear Coefficient ◽  
Crystal Quality

Measurement of the nonlinear coefficient of orientation-patterned GaAs and demonstration of highly efficient second-harmonic generation

2002 ◽  
Vol 27 (8) ◽  
pp. 628 ◽  
Author(s):  
T. Skauli ◽  
K. L. Vodopyanov ◽  
T. J. Pinguet ◽  
A. Schober ◽  
O. Levi ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Nonlinear Coefficient ◽  
Highly Efficient

scholarly journals Optical anapole mode in nanostructured lithium niobate for enhancing second harmonic generation

Nanophotonics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 3575-3585 ◽  
Author(s):  
Yang Li ◽  
Zhijin Huang ◽  
Zhan Sui ◽  
Huajiang Chen ◽  
Xinyue Zhang ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Second Harmonic ◽  
Nonlinear Coefficient ◽  
Excitation Wavelength ◽  
Pump Light ◽  
Hyperbolic Metamaterials ◽  
Wide Range ◽  
Nonlinear Conversion

AbstractSecond harmonic generation (SHG) with a material of large transparency is an attractive way of generating coherent light sources at exotic wavelength range such as VUV, UV and visible light. It is of critical importance to improve nonlinear conversion efficiency in order to find practical applications in quantum light source and high resolution nonlinear microscopy, etc. Here an enhanced SHG with conversion efficiency up to 10−2% at SH wavelength of 282.7 nm under 11 GW/cm2 pump intensity via the excitation of anapole in lithium niobite (LiNbO3, or LN) nanodisk through the dominating d33 nonlinear coefficient is investigated. The anapole has advantages of strongly suppressing far-field scattering and well-confined internal field which helps to boost the nonlinear conversion. Anapoles in LN nanodisk is facilitated by high index contrast between LN and substrate with properties of near-zero-index via hyperbolic metamaterial structure design. By tailoring the multi-layers structure of hyperbolic metamaterials, the anapole excitation wavelength can be tuned at different wavelengths. It indicates that an enhanced SHG can be achieved at a wide range of pump light wavelengths via different design of the epsilon-near-zero (ENZ) hyperbolic metamaterials substrates. The proposed nanostructure in this work might hold significances for the enhanced light–matter interactions at the nanoscale such as integrated optics.

Second-Harmonic Generation in Oriented CdSe-Nanocrystal-Doped Indium Tin Oxide Film and its Application to an Infrared Detector

1999 ◽  
Vol 607 ◽  
Author(s):  
A. Narazaki ◽  
T. Hirano ◽  
J. Sasai ◽  
K. Tanaka ◽  
K. Hirao
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Second Harmonic ◽  
Nonlinear Coefficient ◽  
Film Surface ◽  
Cdse Nanocrystals ◽  
Direction Parallel ◽  
Deposited Films

AbstractSecond-harmonic generation in CdSe nanocrystals doped in indium tin oxide ( ITO ) films has been examined. The thin film samples were prepared by r.f. magnetron sputtering with ITO target on which CdSe chips were placed. The X-ray diffraction patterns of as-deposited films indicate that CdSe crystallites are precipitated in an amorphous ITO matrix, and they are preferentially oriented in the direction of (111) plane of zinc blende structure or (002) plane of wurtzite structure. The mean diameter of CdSe crystallite was estimated to be 3-5 nm using Scherrer's equation. Moreover, the CdSe crystallites grew with keeping its initial orientation when a dc voltage of 50 V/cm was applied in the direction parallel to the film surface. The application of the electric field effectively enhanced the second-harmonic intensity by two orders of magnitude compared to that of the as-deposited films. The second-order nonlinear coefficient d(2) for the electrically-treated specimen calculated on a basis of a modified Maker fringe theory is d31 = 3.0 × 10 pm/V at the wavelength of 1064 nm, which is comparable to d values reported for CdSe single crystal, d31 = 25 pm/V at 1054 nm and d33 =76 pm/V at 1064 nm.

Optical Second Harmonic Generation in Transparent Tellurite Glass-Ceramics Containing BaTiO3

1996 ◽  
Vol 453 ◽  
Author(s):  
Katsuhisa Tanaka ◽  
Hisako Kuroda ◽  
Kazuyuki Hirao ◽  
Naohiro Soga
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Tellurite Glass ◽  
Second Harmonic ◽  
Nonlinear Coefficient ◽  
Glass Ceramics ◽  
Lattice Parameter ◽  
Cubic Phase ◽  
Harmonic Intensity ◽  
Optical Second Harmonic Generation

AbstractOptical second harmonic generation has been observed in transparent tellurite glass-ceramics of Ba0-TiO2-TeO2 system. BaTiO3 and unidentified crystalline phase precipitate from 15BaO·15TiO2·7OTeO2 glass. The temperature of maximum rate of nucleation for these crystalline phases is estimated to be 380°C. The BaTiO3 crystal precipitated is a cubic phase with lattice parameter of 0.4045 nm, which is slightly larger than the value reported in the JCPDS cards. The optical second harmonic intensity of the present transparent tellurite glass-ceramics is comparable to the intensity of poled tellurite glasses although the BaTiO3 phase precipitated is cubic and the crystal face is randomly oriented in the glass-ceramics. For instance, the second harmonic intensity of the present transparent tellurite glass-ceramics is about twice as large as that of 20WO3·80TeO2 glass poled at 280°C under the external electric field of 3 kV, the second-order nonlinear coefficient, d33, of which is 0.10 pm/V.

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