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HL: Fachverband Halbleiterphysik

HL 21: Optical Properties 1

HL 21.10: Vortrag

Mittwoch, 7. September 2022, 17:45–18:00, H32

Optimization of Silicon Nanoantenna for Optical Phased Arrays — •Andreas Strauch, Henna Farheen, Viktor Myroshnychenko, and Jens Förstner — University Paderborn - Department of Electrical Engineering and Information Technology, Paderborn, Germany

The classical microwave phased array is a proven antenna technology since the beginning of the last century. Among other things, it leads to significant improvements in radar technology as well as mobile, radio and satellite communications. Beyond that, this principal is not limited to the microwave band and can transfer into the optical spectrum, such as for light detection and ranging (LIDAR). The specific, technical features of the optical phased array (OPA) are the fast, non mechanical variation of directional characteristic (beam steering) during the operation and the great beam focusing through an ensemble of sophisticatedly, interacting single antennas. Besides them, the usage of serveral single antennas increases the redundancy and gives a high operational reliability and signal-to-noise ratio.

We designed, numerically analyzed, and optimized an efficient Silicon on Insulator (SOI) based photonic light transmitter, working in the infrared band, with high antenna gain and sidelobe attenuation (super resolution in principle), high redundancy and noise robustness and most important an electronically, configurable farfield characteristic. In comparison to a reference design, we increased the radiation efficiency from 2.66 to 9% by numerical optimization using evolutionary and natural analogue approaches.