Multi-pixel photoconductive emitters for the controllable generation of azimuthal and radial terahertz beams.
Multi-pixel photoconductive emitters for the controllable generation of azimuthal and radial terahertz beams.
复制标题
多像素光电导发射器，用于可控生成方位角和径向太赫兹光束。
作者：
J. Deveikis;J. Lloyd‐Hughes
报道了一种多像素光电导发射器，它可以产生具有方位、径向或线偏振态的太赫兹光束。通过施加偏置电压，在不同的极化状态之间进行切换是纯电气的，从而避免了使用机械极化光学装置或不同的太赫兹发射器来改变极化的需要。为了验证发射极阵列的设计并探索其最佳偏置配置，进行了偶极子阵列建模，而对产生的光束的空间分辨电光检测证实了柱面矢量光束的产生。我们进一步证明，通过调整特定像素上的偏置电平来优化空间波束轮廓，提高了波束的偏振纯度。
A multi-pixel photoconductive emitter is reported that generates THz beams with either azimuthal, radial or linear polarization states. Switching between the different polarization states was purely electrical, via the bias voltage applied, circumventing the need for mechanical polarization optics or different THz emitters to change the polarization. Dipole array modelling was performed to validate emitter array designs, and to explore their optimal bias configuration, while spatially-resolved electro-optic detection of the generated beams confirmed that cylindrical-vector beams were produced. We further demonstrate that the spatial beam profile was optimized by adjusting the bias level on particular pixels, improving the polarization purity of the beam.
影响因子：
3.6
作者：
Skelton, S. E.;Sergides, M.;Jones, P. H.
通讯作者：
Jones, P. H.