Abstract
We present a new flexible technology to generate broadband antireflection structures for the THz frequency range on planar and curved surfaces of silicon optics. Ultrashort laser pulses are used to ablate the surface in order to form subwavelength structures. Such structures effectively provide a gradual transition of the refractive index from air to silicon. We demonstrate antireflection structures on convex silicon lenses of both photoconductive emitter and detector devices. Thus, the THz pulse amplitude can be increased by about 28% and the spectral amplitude of single frequencies up to 58% in the range from 0.1 to 1.5 THz.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.