Efficient second harmonic conversion efficiency through one-dimensional coupled resonator poled nonlinear optical waveguide

2013 ◽  
Vol 111 (2) ◽  
pp. 525-529 ◽  
Author(s):  
S. M. Hamidi ◽  
T. Parvini ◽  
M. M. Tehranchi
Keyword(s):  
Optical Waveguide ◽  
Conversion Efficiency ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
One Dimensional ◽  
Harmonic Conversion ◽  
Coupled Resonator

OPTICAL BISTABILITY IN ONE-DIMENSIONAL COUPLED RESONATOR NONLINEAR OPTICAL WAVEGUIDE

2013 ◽  
Vol 22 (01) ◽  
pp. 1350003
Author(s):  
S. M. HAMIDI ◽  
Z. ESLAMIAT
Keyword(s):  
Band Gap ◽  
Optical Waveguide ◽  
Nonlinear Optical ◽  
Optical Bistability ◽  
Photonic Band Gap ◽  
Wave System ◽  
One Dimensional ◽  
Bistable Switching ◽  
Photonic Band ◽  
Coupled Resonator

In this paper, the optical bistability in finite size one-dimensional coupled resonator nonlinear optical waveguide has been investigated. To calculate the bistable switching manner in five proposed structures, we use the linear and nonlinear transfer matrices with fixed point iteration method. Our results show that the threshold and domain of bistable switching answer depend on the defect region in one-dimensional coupled resonator nonlinear optical waveguides. Also, the best answer of switch takes place at the left and right edges of the photonic band gap of the structures depending on the defect regions. In fact, due to the presence of the photonic band gap in the slow wave system, the density of states of the electromagnetic fields is large at the photonic band edge and photonic defect modes and thus the group velocity is small, and the local field is enhanced. All these factors contribute to a significant decrease in the threshold of optical bistable switching devices.

Ba2Ge2Te5: a ternary NLO-active telluride with unusual one-dimensional helical chains and giant second-harmonic-generation tensors

2021 ◽  
Author(s):  
Mao-Yin Ran ◽  
Zuju Ma ◽  
Xintao Wu ◽  
Hua Lin ◽  
Qi-Long Zhu
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Metal Chalcogenides ◽  
One Dimensional

The class of non-centrosymmetric (NCS) metal chalcogenides is the most favorable candidates for promising nonlinear optical (NLO) crystals in the infrared (IR) band. However, most research achievements pay them attention...

scholarly journals Na4Yb(CO3)3F: A New UV Nonlinear Optical Material with a Large Second Harmonic Generation Response

Crystals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 381
Author(s):  
Qiaoling Chen ◽  
Min Luo ◽  
Chensheng Lin
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Diffuse Reflectance ◽  
Second Harmonic ◽  
Three Dimensional ◽  
One Dimensional ◽  
Nonlinear Optical Crystals ◽  
3D Network ◽  
3D Framework

A new nonlinear optical crystals fluoride carbonate, Na4Yb(CO3)3F, has been synthesized by mild hydrothermal method. The Na4Yb(CO3)3F crystallizes in the noncentrosymmetric space group Cc (no. 9) with the lattice parameters a = 8.018(3), b = 15.929(5), c = 13.950(5) Å and β = 101.425(6)°. The compound Na4Yb(CO3)3F has a high density of [CO3] groups. The structure can be described as one-dimensional [Na5Yb(CO3)2F2] chains connected by [CO3] groups, forming an intricate three-dimensional (3D) framework. Other Na+ and Yb3+ cations are located in the cavities of 3D network. The powder second harmonic generation (SHG) measurement shows that Na4Yb(CO3)3F features a large SHG response, about 4.3 times that of KH2PO4 (KDP), and is a phase-matchable material. In addition, its UV-Vis-NIR diffuse reflectance spectral data indicate that Na4Yb(CO3)3F has a large optical gap about 4.72 eV, which corresponds to the UV cut-off edge of 263 nm.

ENHANCING CONVERSION EFFICIENCY IN THE SECOND-ORDER NONLINEAR OPTICAL PHENOMENA

2004 ◽  
Vol 13 (03n04) ◽  
pp. 445-449
Author(s):  
JONGBAE KIM ◽  
JUNG JIN JU ◽  
MIN-SU KIM
Keyword(s):  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Second Order ◽  
Phase Matching ◽  
Quasi Phase Matching ◽  
Optical Phenomena ◽  
Nonlinear Optical Phenomena ◽  
Second Order Nonlinearity

The distributions of electric field and the induced second-order nonlinearity are discussed in a poling scheme where the width of a periodic electrode is shorter than the conventional coherent length. The theoretical aspects of quasi-phase matching for a subsequent experiment in second harmonic generation are analyzed. The present analysis consistently explains that the conversion efficiency can be enhanced if the electrode width is shortened, and maximized if the electrode width is optimized.

Resonantly enhanced second harmonic generation in a one-dimensional GaN-based photonic crystal slab

2004 ◽  
Vol 831 ◽  
Author(s):  
Jérémi Torres ◽  
Marine Le Vassor d'Yerville ◽  
David Cassagne ◽  
René Legros ◽  
Jean-Paul Lascaray ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Second Harmonic ◽  
Incident Beam ◽  
Fundamental Field ◽  
One Dimensional ◽  
Resonance Effects ◽  
Photonic Crystal Slab ◽  
Harmonic Field ◽  
Beam Incident ◽  
Harmonic Conversion

ABSTRACTWe have performed investigations of resonance effects inside a gallium nitride one-dimensional photonic crystal slab in order to enhance the second-harmonic generated from an beam incident on the surface of the slab. Convenient conditions on the incident beam propagation direction and polarization are first identified by experimental or theoretical linear optical studies. Giant enhancements in the second-harmonic conversion have been obtained by comparison with the unpatterned GaN layer. The combined role of the resonant coupling of the fundamental field and of the second-harmonic field has been observed by rotating the polarization of the fundamental beam.

scholarly journals Analytical approximation of the second-harmonic conversion efficiency

2020 ◽  
Vol 59 (28) ◽  
pp. 9010
Author(s):  
John R. Daniel ◽  
Shan-Wen Tsai ◽  
Boerge Hemmerling
Keyword(s):  
Conversion Efficiency ◽  
Second Harmonic ◽  
Analytical Approximation ◽  
Harmonic Conversion
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