Accession Number:

AD1047981

Title:

Non-Magnetic On-Chip Resonant Acousto-Optic Isolator at 780 nm

Descriptive Note:

Technical Report,09 Nov 2015,01 Jul 2017

Corporate Author:

University of Illinois Urbana United States

Personal Author(s):

• Bahl,Gaurav

Report Date:

2017-08-04

Pagination or Media Count:

22.0

Abstract:

The goal of this project was to demonstrate a lithographically defined proof-of-concept optical isolator on-chip, without the use of magneticfields or magneto-optical materials. Our technical approach was to employ momentum-conservation in photon-phonon interactions to breakthe propagation symmetry of light using a unidirectional acoustic pump. This acoustic wave was transduced using an RF-driven SAWactuator on a piezoelectric substrate. We fabricated the device using only CMOS-compatible dielectric materials with the assistance of e-beamlithopgraphy. The final device operated as a frequency-shifting isolator near 1550 nm telecom wavelength and exhibited 15 dB ofnon-reciprocal contrast with 7.7 dB insertion loss. We also demonstrated on-chip components that would permit implementation of thisisolator at 780 nm for cold-atom microsystems applications, laying out paths for future development and improvements.

Descriptors:

• OPTICAL ISOLATORS
• ACOUSTO OPTICS
• OPTICAL NONRECIPROCAL DEVICES
• NONLINEAR OPTICS
• ALUMINUM NITRIDES

Subject Categories:

• Electrical and Electronic Equipment
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE