Quantum nonlinear optics in III-V semiconductors/ Nonlinear frequency conversion in gallium nitride nanoresonator

III-V族半导体中的量子非线性光学/氮化镓纳米谐振器中的非线性频率转换

• 批准号: 2128651
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2128651
• 关键词: Quantum; nonlinear; optics; III; semiconductors

We investigate an all-dielectric gallium nitride nanoresonator with conical geometry. This system possesses low absorption and high refractive index while also supporting mie resonances that enhance its potential for nonlinear frequency conversion. We employ finitedifference time-domain (FDTD) simulations to identify the wavelengths of resonant modes via their scattering cross-sections and study how the mode wavelengths shift with varying cone diameters and angles. We then fabricate gallium nitride nanoresonators with the desired parameters and measure their second order nonlinear susceptibilities via second harmonic generation. By precisely engineering the shape and size of the nanoresonators, we support the efforts to optimize nanoscale frequency conversion processes which are crucial in a wide variety of applications.

我们研究了一种圆锥形的氮化镓全介质纳米谐振器。该系统具有低吸收和高折射率，同时还支持米氏共振，增强其非线性频率转换的潜力。我们采用时域有限差分（FDTD）模拟，以确定谐振模式的波长，通过其散射截面和研究模式波长如何随着不同的锥直径和角度的变化而变化。然后，我们制作了氮化镓纳米谐振器与所需的参数和测量其二阶非线性极化率通过二次谐波产生。通过精确设计纳米谐振器的形状和尺寸，我们支持优化纳米级频率转换过程的努力，这在各种应用中至关重要。