Abstract
A novel structure for THz photoconductive antennas (PCA) has been proposed to enhance the optical absorption, and consequently the power conversion efficiency. In the proposed structure, the surface of the low-temperature-grown GaAs (LTG-GaAs) substrate is textured to create an array of nanodisks where an array of silver nanodisks is placed 300 nm under the surface. The simulation results indicate that laser pulse reflection from the LTG-GaAs surface decreases to less than one percent as compared to around 30 % reflection for surfaces with no nanostructure features. As a result, the photo current increases by a factor of around 2.6 for the proposed structure. This would increase the generated THz power by the current enhancement factor squared.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
