High quality integrated LiNbO3 acousto-optic platform for visible light spectrum

Orsel, Ogulcan Emre

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https://hdl.handle.net/2142/110858 Copy

Description

Title

High quality integrated LiNbO3 acousto-optic platform for visible light spectrum

Author(s)

Orsel, Ogulcan Emre

Issue Date

2021-04-28

Director of Research (if dissertation) or Advisor (if thesis)

Bahl, Gaurav

Department of Study

Mechanical Sci & Engineering

Discipline

Mechanical Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

Integrated photonics, acousto-optics, electro-optics, nonlinear photonics

Abstract

The laser's invention, which produced a coherent light source, has accelerated the development of acousto-optic platforms (AlN, GaN, Quartz, LiNbO3) for many practical applications such as beam steering, signal processing, and intensity modulation. The recent integration of on-chip acousto-optic devices with photonic integrated circuits lead to many different acousto-optic devices such as efficient microwave converters, optical isolators, and wavelength scale acousto-optic frequency shifters, which were not realizable before. However, all of these devices target the 1550 nm optical wavelength or mid IR spectrum, and there is no integrated acousto-optic platform for visible wavelengths to the best of our knowledge. This thesis proposes that a LiNbO3 platform can produce a high acousto-optic coupling rate that can be used as a microwave to optical conversion. To have high coupling, we utilized LiNbO3's ultra-high electromechanical coupling for S0 lamb wave mode excitation. We employed LiNbO3's ultra-low optical loss as an interaction enhancement between light and sound for our resonator structures. Our results revealed that intra-band/inter-band optical scattering in LiNbO3 is strongly enhanced by its large piezoelectric, photoelastic, and electro-optic coefficients leading to efficient sideband generation.

Graduation Semester

2021-05

Type of Resource

Thesis

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http://hdl.handle.net/2142/110858

Copyright and License Information

Copyright 2021 Ogulcan Emre Orsel

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