High conversion efficiency of second‐harmonic generation in step quantum wells

1992 ◽  
Vol 61 (20) ◽  
pp. 2401-2402 ◽  
Author(s):  
Zhenghao Chen ◽  
Dafu Cui ◽  
Meihua Li ◽  
Chao Jiang ◽  
Junming Zhou ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Quantum Wells ◽  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Second Harmonic ◽  
High Conversion ◽  
High Conversion Efficiency

scholarly journals Peculiarities of second harmonic generation with chirped femtosecond pulses at high conversion efficiency

2020 ◽  
Vol 455 ◽  
pp. 124462 ◽  
Author(s):  
Pierre-Marc Dansette ◽  
Raimundas Burokas ◽  
Laurynas Veselis ◽  
Audrius Zaukevičius ◽  
Andrejus Michailovas ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Second Harmonic ◽  
High Conversion ◽  
Femtosecond Pulses ◽  
High Conversion Efficiency

scholarly journals Fano Resonance on Nanostructured Lithium Niobate for Highly Efficient and Tunable Second Harmonic Generation

Nanomaterials ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 69 ◽  
Author(s):  
Zhijin Huang ◽  
Huihui Lu ◽  
Hanqing Xiong ◽  
Yang Li ◽  
Huajiang Chen ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Fano Resonance ◽  
Second Harmonic ◽  
High Conversion ◽  
Nonlinear Microscopy ◽  
High Conversion Efficiency ◽  
Nonlinear Conversion

Second harmonic generation (SHG) is an important nonlinear process which is critical for applications, such as optical integrated circuit, nonlinear microscopy, laser, etc. Many challenges remain in the improvement of nonlinear conversion efficiency, since the typical value is of only 10−5 in nanostructures. Here, we theoretically demonstrate a periodic structure consisting of a lithium niobate (LN) bar and an LN disk, on a nanoscale (~300 nm) thin-film platform, which is proposed for a highly efficient SHG. By breaking the structure symmetry, a Fano resonance with a high Q, up to 2350 and a strong optical field enhancement reaching forty-two folds is achieved, which yields a high conversion efficiency, up to 3.165 × 10−4. In addition to its strong second harmonic (SH) signal, we also demonstrate that by applying only 0.444 V on the planar electrode configurations of the nanostructured LN, the wavelength of SH can be tuned within a 1 nm range, while keeping its relatively high conversion efficiency. The proposed structure with the high nonlinear conversion efficiency can be potentially applied for a single-molecule fluorescence imaging, high-resolution nonlinear microscopy and active compact optical device.

Second Harmonic Generation with High Conversion Efficiency and Wide Temperature Tolerance by Multi-Pass Scheme

2008 ◽  
Vol 1 ◽  
pp. 032003 ◽  
Author(s):  
Tetsuro Mizushima ◽  
Hiroyuki Furuya ◽  
Shinichi Shikii ◽  
Koichi Kusukame ◽  
Kiminori Mizuuchi ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Conversion Efficiency ◽  
Second Harmonic ◽  
Temperature Tolerance ◽  
High Conversion ◽  
High Conversion Efficiency ◽  
Pass Scheme
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