scholarly journals Efficient second harmonic generation in nanophotonic waveguides for optical signal processing

2013 ◽  
Vol 102 (15) ◽  
pp. 151114 ◽  
Author(s):  
K. Lenglé ◽  
L. Bramerie ◽  
M. Gay ◽  
J.-C. Simon ◽  
S. Combrié ◽  
...  
Keyword(s):  
Signal Processing ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Optical Signal Processing ◽  
Second Harmonic ◽  
Optical Signal ◽  
Nanophotonic Waveguides

Large and anisotropic second harmonic generation of V-V binary phosphorene derivative with permanent dipole

2021 ◽  
Author(s):  
Yadong Wei ◽  
Songsong Wang ◽  
Kaijuan Pang ◽  
Xiaodong Xu ◽  
Ngeywo Tolbert Kaner ◽  
...  
Keyword(s):  
Signal Processing ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
2D Materials ◽  
Optical Nonlinearity ◽  
Optical Signal ◽  
Two Dimensional ◽  
All Optical ◽  
Intense Research

Optical nonlinearity of two-dimensional (2D) materials with permanent dipole is a subject of intense research in the fields ranging from all-optical signal processing to laser nanotechnology due to the potential...

scholarly journals Investigation of Mid-Infrared Broadband Second-Harmonic Generation in Non-Oxide Nonlinear Optic Crystals

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 921
Author(s):  
Ilhwan Kim ◽  
Donghwa Lee ◽  
Kwang Jo Lee
Keyword(s):  
Second Harmonic Generation ◽  
Nonlinear Optic ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Short Pulse ◽  
Optical Signal ◽  
Fundamental Wave ◽  
Molecular Fingerprint ◽  
Mid Infrared ◽  
Wide Range

The mid-infrared (mid-IR) continuum generation based on broadband second harmonic generation (SHG) (or difference frequency generation) is of great interest in a wide range of applications such as free space communications, environmental monitoring, thermal imaging, high-sensitivity metrology, gas sensing, and molecular fingerprint spectroscopy. The second-order nonlinear optic (NLO) crystals have been spotlighted as a material platform for converting the wavelengths of existing lasers into the mid-IR spectral region or for realizing tunable lasers. In particular, the spectral coverage could be extended to ~19 µm with non-oxide NLO crystals. In this paper, we theoretically and numerically investigated the broadband SHG properties of non-oxide mid-IR crystals in three categories: chalcopyrite semiconductors, defect chalcopyrite, and orthorhombic ternary chalcogenides. The technique is based on group velocity matching between interacting waves in addition to birefringent phase matching. We will describe broadband SHG characteristics in terms of beam propagation directions, spectral positions of resonance, effective nonlinearities, spatial walk-offs between interacting beams, and spectral bandwidths. The results will show that the spectral bandwidths of the fundamental wave allowed for broadband SHG to reach several hundreds of nm. The corresponding SH spectral range spans from 1758.58 to 4737.18 nm in the non-oxide crystals considered in this study. Such broadband SHG using short pulse trains can potentially be applied to frequency up-conversion imaging in the mid-IR region, in information transmission, and in nonlinear optical signal processing.

scholarly journals Semi-Nonlinear Nanophotonic Waveguides for Highly Efficient Second-Harmonic Generation

2019 ◽  
Vol 13 (3) ◽  
pp. 1800288 ◽  
Author(s):  
Rui Luo ◽  
Yang He ◽  
Hanxiao Liang ◽  
Mingxiao Li ◽  
Qiang Lin
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Highly Efficient ◽  
Nanophotonic Waveguides
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