Saha Moumita, Deb Sumita
Appl Opt. 2022 Apr 20;61(12):3494-3501. doi: 10.1364/AO.453033.
This work demonstrates the elliptically polarized radiation of sum-frequency generation by the total-internal-reflection-based optical rotation quasi-phase-matching technique that allows polarization rotation in the presence of an external electric field across a rectangular-shaped, -coated, MgO-doped crystal. This thin film is employed to control the phase shifts generated by - and -polarized light propagation at each bounce point of the slab-film interface. The computer-aided simulation yielded a high conversion efficiency of 7.5%/W/cm, reflecting the combined field impact of the optical rotation quasi-phase-matching and fractional quasi-phase-matching approaches. Moreover, the conversion yielding limiting factors such as absorption, surface roughness, and the interference effect of the nonlinear law of reflection have also been included to simulate the generation of a 770 nm wavelength. A comparative assessment of the generated linearly and elliptically polarized radiations has also been addressed.
这项工作展示了基于全内反射的旋光准相位匹配技术产生的和频产生椭圆偏振辐射，该技术允许在外部电场存在的情况下，使偏振在矩形涂覆的掺氧化镁晶体中发生旋转。该薄膜用于控制在平板 - 薄膜界面的每个反射点处由偏振光和偏振光传播产生的相移。计算机辅助模拟得出了7.5%/W/cm的高转换效率，反映了旋光准相位匹配和分数准相位匹配方法的综合场效应。此外，还纳入了诸如吸收、表面粗糙度以及非线性反射定律的干涉效应等转换产生限制因素，以模拟770nm波长的产生。还对产生的线偏振辐射和椭圆偏振辐射进行了比较评估。
