论文标题
一种用于改善远场特性和宽带Terahertz量子级联激光器的抗原vivaldi天线
An antipodal Vivaldi antenna for improved far-field properties and polarization manipulation of broadband terahertz quantum cascade lasers
论文作者
论文摘要
我们提出了一种用于宽带双金属波导Terahertz量子级联激光器和频率梳子的抗杀菌天线。它的指数弯曲的耀斑轮廓可导致绝热的平面模式膨胀，从而产生改进的远场，单杆（23°x19°）的单杆束最大为（23°x19°），最大宽度最大，并带有八度跨度带宽。天线还充当波形延迟器，将极化从垂直偏振旋转到频率依赖性角度。激光的发射光谱和电流 - 电压特性也不影响频率梳子操作。测量值与数值模拟非常吻合，并且所提出的天线涵盖了较大的光谱范围（1.5-4.5 THz）。
We present an antipodal Vivaldi antenna for broadband double metal waveguide terahertz quantum cascade lasers and frequency combs. Its exponentially curved flare profile results in an adiabatic in-plane mode expansion, producing an improved far-field with a single-lobed beam of (23°x19°) full width half maximum with an octave-spanning bandwidth. The antenna also acts as a wave retarder, rotating the polarization from vertical toward horizontal polarization by a frequency-dependent angle. The laser's emission spectrum and current-voltage characteristics are not affected, as well as frequency comb operation. Measurements agree well with numerical simulations, and the proposed antenna covers a broad spectral range (1.5-4.5 THz).
