Enhancement of the second harmonic signal of nonlinear crystals by a single metal nanoantenna

Nanoscale ◽  
2020 ◽  
Vol 12 (45) ◽  
pp. 23105-23115
Author(s):  
Emre Gürdal ◽  
Anke Horneber ◽  
Alfred J. Meixner ◽  
Dieter P. Kern ◽  
Dai Zhang ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Harmonic Signal ◽  
Nonlinear Crystals ◽  
Second Harmonic Signal ◽  
Optical Nanoantennas

This work fundamentally investigates how the second harmonic generation (SHG) from commercial nonlinear crystals can be boosted by the addition of individual optical nanoantennas.

scholarly journals Transverse second-harmonic generation from disordered nonlinear crystals

Open Physics ◽  
2008 ◽  
Vol 6 (3) ◽  
Author(s):  
Robert Fischer ◽  
Solomon Saltiel ◽  
Dragomir Neshev ◽  
Wieslaw Krolikowski ◽  
Yuri Kivshar
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Harmonic Signal ◽  
Random Structure ◽  
Strontium Barium ◽  
Short Pulses ◽  
Nonlinear Crystals ◽  
Ferroelectric Domains ◽  
Second Harmonic Signal

AbstractWe investigate the transverse second-harmonic generation in as grown strontium barium niobate (SBN) crystals with a random structure of anti-parallel ferroelectric domains. We consider both, single and counter-propagating pulse geometries. We investigate polarization properties of the second harmonic signal and discuss applications of this process for short pulses characterization.

SECOND HARMONIC GENERATION IN ZnO NANORODS

2010 ◽  
Vol 19 (03) ◽  
pp. 445-458 ◽  
Author(s):  
MALYAJ DAS ◽  
SHIVANI RANA ◽  
PRATIMA SEN
Keyword(s):  
Second Harmonic Generation ◽  
Comparative Study ◽  
Harmonic Generation ◽  
Nd:Yag Laser ◽  
Second Harmonic ◽  
Zno Nanorods ◽  
Harmonic Signal ◽  
Pulsed Nd:Yag Laser ◽  
Micro Particles ◽  
Second Harmonic Signal

A comparative study of the second harmonic generation in ZnO micro particles and nanorods has been experimentally studied by Kurtz technique using nanosecond pulsed Nd:YAG laser. The results have been theoretically explained by taking into account the quadrupole moment as well as surface nonlinearity. It was observed that the nanorods yield polarized second harmonic signal while the second harmonic signal obtained from the micro particles was unpolarized.

Efficient Second Harmonic Generation in Hydrazone, Derivatives of Substituted Aromatic Aldehydes

1989 ◽  
Vol 173 ◽  
Author(s):  
Richard S. Potember ◽  
Robert C. Hoffman ◽  
Karen A. Stetyick
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Harmonic Signal ◽  
Aromatic Aldehydes ◽  
Dihydrogen Phosphate ◽  
Ammonium Dihydrogen Phosphate ◽  
Harmonic Signals ◽  
Derivatives Of ◽  
Second Harmonic Signal

ABSTRACTHydrazone, 1,1-dimethylhydrazone, methylhydrazone, phenylhydrazone and p-nitrophenyl hydrazone derivatives of substituted aromatic aldehydes were prepared and screened for second harmonic generation using the Kurtz powder technique. One compound, 4-nitro-3-methoxybenzaldehyde hydrazone exhibited a second harmonic signal up to 32 times that of ammonium dihydrogen phosphate (ADP) and 4-nitrobenzaldehyde hydrazone exhibited a second harmonic signal five times higher than previously reported, up to 40 times that of ADP. 3-methyl-4-nitrobenzaldehyde hydrazone, 4-nitrobenzaldehyde phenylhydrazone, 1-naphthaldehyde phenylhydrazone, 1-pyrenecarboxaldehyde phenylhydrazone exhibited second harmonic signals 25, 2.5, 5 and 20 times that of an ADP standard.

All-Optical Poling Properties of the Host-Guest Adulterant Thin-Films

2011 ◽  
Vol 217-218 ◽  
pp. 549-554
Author(s):  
Xue Xi Gao ◽  
Wen Jun Wang ◽  
Yun Long Liu ◽  
Yun Li
Keyword(s):  
Thin Films ◽  
Light Intensity ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Room Temperature ◽  
Second Harmonic ◽  
Harmonic Signal ◽  
Poling Temperature ◽  
All Optical ◽  
Second Harmonic Signal

The poling conditions were studied in AOP process by second harmonic generation (SHG) for host-guest adulterant thin-films. The guest was 4’-Nitro-4-dimethylaminoazobenzene and host was PMMA. The experimental results showed that the optimal poling temperature was about room temperature, the optimal ratio of light intensity of fundamental signal (ω) and its second harmonic signal (2ω) during AOP was approximately 100, the thin films had the same rule that the saturated value of SHG depended on the ratio. In addition, we obtained a suitable thickness around 2200nm that the stronger SHG after poling was generated.

Investigation of Second Harmonic Generation in MOCVD Grown Barium Titanate Thin Films

1993 ◽  
Vol 335 ◽  
Author(s):  
Bipin Bihari ◽  
Xin Li Jiang ◽  
Jayant Kumar ◽  
Gregory T. Stauf ◽  
Peter C. Van Buskirk
Keyword(s):  
Thin Films ◽  
Barium Titanate ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Harmonic Signal ◽  
Growth Conditions ◽  
Incident Wavelength ◽  
Harmonic Intensity ◽  
Second Harmonic Signal

AbstractFerroelectric Barium titanate (BaTiO3) thin films have potential applications in optical devices such as frequency doublers. Second harmonic generation (SHG) in MOCVD grown epitaxial thin films of BaTiO3 on MgO substrates is reported at an incident wavelength of 1.064 microns. A number of as-grown films show substantial second harmonic signal. Angular dependence of second harmonic intensity from as-grown films reveals that the orientation of the c-axis in these films are dependent on the growth conditions. We have examined the effect of heating and corona poling on the second harmonic generated by the samples. A higher level of SHG was observed during application of the electric field. On the removal of the poling field the second harmonic signal relaxes back. This behavior may indicate substrate-induced strain stabilization of domains.

Thin Film Cavity Ringdown Spectroscopy and Second Harmonic Generation on Thin a-Si:H Films

2003 ◽  
Vol 762 ◽  
Author(s):  
I.M.P. Aarts ◽  
B. Hoex ◽  
J.J.H. Gielis ◽  
C.M. Leewis ◽  
A.H.M. Smets ◽  
...  
Keyword(s):  
Thin Film ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Surface States ◽  
Harmonic Signal ◽  
Spectral Signature ◽  
Cavity Ringdown Spectroscopy ◽  
Cavity Ringdown ◽  
Second Harmonic Signal

AbstractA set of 8 rf deposited a-Si:H thin films of various thickness (4-1031nm) have been used to explore the applicability of two optical techniques, thin film cavity ringdown spectroscopy (tfCRDS) and second harmonic generation (SHG), for the measurement of small defect-related absorptions. In this paper we will give a first overview of the different aspects of these techniques, which are novel in the field of amorphous silicon materials. It is shown that tf-CRDS is capable of measuring defect-related absorptions (associated with dangling bonds) as small as 10-7 for a single measurement, without the need for elaborate calibration procedures. The results are compared with photothermal deflection spectroscopy (PDS) for a broad spectral range (0.7 – 1.7 eV) and show good agreement. Furthermore the existence of a defect-rich surface layer with a defect density of 1.1×1012 cm-2 has been proven. The absorption spectrum of a 4 nm thin film has revealed a different spectral signature than a bulk dominated (1031 nm) film. The SHG experiments on a-Si:H films have shown that the second harmonic signal arises from the surface states and polarization dependent studies have revealed that the surface states probed have an ∞m-symmetry. From this it can be deduced that the absorbing surface states are isotropically distributed. A spectral scan suggests that the second harmonic signal, whose origin has not been unrevealed yet, has a resonance at an incident photon energy of 1.22 eV.

PROBING ALIGNMENT OF LIQUID CRYSTALS ON SILANE DERIVATIVES BY SECOND HARMONIC GENERATION

2001 ◽  
Vol 10 (02) ◽  
pp. 133-142 ◽  
Author(s):  
S. SORIA ◽  
D. SCHUHMACHER ◽  
G. MAROWSKY ◽  
R. BARBERI ◽  
F. CIUCHI ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Liquid Crystalline ◽  
Uv Light ◽  
Second Harmonic ◽  
Harmonic Signal ◽  
Crystalline Polymer ◽  
Linearly Polarized ◽  
Control Layer ◽  
Second Harmonic Signal

We studied surface second-harmonic generation from thin films of 4'-n-pentyl-4-cyano-biphenyl (5CB) nematic liquid crystal (NLC) deposited onto layers of several silanes dipped on conductive glasses. We also studied a new liquid crystalline polymer deposited onto silanized substrates. The cinnamoyl side groups of this polymer can be aligned by linearly polarized UV light. The average orientation and surface order of the nematic were determined by Fourier analysis of the reflected and transmitted angular dependent second harmonic signal. The aim was to check the possible use of these materials as a control layer for the anchoring properties of nematics.

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