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High-Efficiency, Wide Working Bandwidth Antenna Based on SOI Platform for Optical Phased Array.

Zihao Wang1, Jiali Liao1,2, Yixiang Xie3

  • 1School of Physics and Optoelectronic Engineering, XiDian University, Xi'an 710071, China.

Micromachines
|August 27, 2021
PubMed
Summary
This summary is machine-generated.

A new subwavelength surface optical antenna design offers high emission efficiency and wide bandwidth. This optical phased array antenna enables broad scanning angles with excellent background suppression.

Keywords:
integrated opticsnano-opticsoptical antennaoptical phased array

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Area of Science:

  • Photonics and Nanotechnology
  • Optical Engineering
  • Antenna Design

Background:

  • Optical phased arrays (OPAs) are crucial for beam steering applications.
  • Existing OPA designs often face challenges with emission efficiency and bandwidth.
  • Subwavelength surface optical antennas are key components for miniaturized OPAs.

Purpose of the Study:

  • To propose and investigate a novel subwavelength surface optical antenna structure for OPAs.
  • To achieve high emission efficiency and a wide working bandwidth.
  • To evaluate the far-field scanning performance of a 16-channel OPA using the proposed antenna.

Main Methods:

  • Design of an asymmetric vertical grating structure for the optical antenna.
  • Characterization of emission efficiency at 1550 nm.
  • Measurement of the 1 dB bandwidth.
  • Investigation of far-field scanning characteristics for a 16-channel OPA.

Main Results:

  • Achieved a high emission efficiency of 73% at 1550 nm.
  • Demonstrated a wide 1 dB working bandwidth from 1350 nm to 1850 nm.
  • Observed a background suppression of -24.5 dB with a scan range of ±14.8° × 73.6°.

Conclusions:

  • The proposed asymmetric vertical grating structure offers a promising solution for high-performance OPAs.
  • The antenna design exhibits excellent efficiency, bandwidth, and scanning capabilities.
  • This work contributes to the advancement of optical beam steering technologies.