2026-09-21T23:10:24Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/110858 2023-07-11 col_2142_5131 col_2142_14787 com_2142_5130 com_2142_9630 com_2142_234

Bahl, Gaurav Orsel, Ogulcan Emre 2021-09-17T04:06:53Z 2021-09-17T04:06:53Z 2023-09-17T04:07:01Z 2021-04-28 2021-05 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. Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-05-01 The student, Ogulcan Orsel, accepted the attached license on 2021-04-26 at 13:12. The student, Ogulcan Orsel, submitted this Thesis for approval on 2021-04-26 at 13:22. This Thesis was approved for publication on 2021-04-28 at 11:17. DSpace SAF Submission Ingestion Package generated from Vireo submission #16559 on 2021-09-16 at 20:14:19 Made available in DSpace on 2021-09-17T04:06:53Z (GMT). No. of bitstreams: 2 ORSEL-THESIS-2021.pdf: 10307498 bytes, checksum: f26f66d6ba8e59e6710b44fbd7f5fa8f (MD5) LICENSE.txt: 4210 bytes, checksum: adee63cdc40ec05b9b4ba134fe918fb8 (MD5) Previous issue date: 2021-04-28 Embargo set by: Seth Robbins for item 118704 Lift date: 2023-09-17T04:07:01Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Author requested closed access (OA after 2yrs) in Vireo ETD system Limited application/pdf http://hdl.handle.net/2142/110858 en Copyright 2021 Ogulcan Emre Orsel Integrated photonics, acousto-optics, electro-optics, nonlinear photonics High quality integrated LiNbO3 acousto-optic platform for visible light spectrum text Thesis Mechanical Sci & Engineering Mechanical Engineering University of Illinois at Urbana-Champaign Thesis M.S.