Abstract

In order to overcome the drawbacks associated with conventional bulk lithium niobate photonic, thin-film lithium-niobate-on-silicon has been pursued recently. This work presents contributions made to electro-, and nonlinear-optic applications of this technology. For electrooptic applications, detailed modeling and design guidelines of optical and radio-frequency parameters of ultracompact modulators are developed and their accuracy in predicting the high-speed performance of such devices have been verified by comparison with experimental results. Novel design techniques and pathways for ultrahigh-speed (sub-terahertz) operation of such modulators, achieving up to 400 GHz modulation bandwidth, are also presented. For optical interconnect applications, novel structures for ultralow-power consumption modulators are designed and fabricated. Coherent modulation schemes, such as quadrature phase shift keying, is also pursued on the same thin-film platform for advanced optical communication systems. For nonlinear-optic applications, fabrication integrability of thin-film lithium niobate and chalcogenide glass waveguides on a single silicon chip for future directions, such as on-chip self-referenced optical frequency comb generation, is experimentally demonstrated. That is a pathway for both second- and third-order optical nonlinearity occurring on lithium niobate and chalcogenide, respectively, is designed and presented. An innovative and robust foundry-compatible back-end-of-line integration method is also proposed, in order to integrate thin-film lithium niobate devices with silicon or silicon-nitride photonic circuitry. Overall, this work extends the capabilities of the thin-film lithium niobate technology for novel electro- and nonlinear-optic applications. Finally, extensions of the aforementioned results suitable for future work are discussed.

Notes

If this is your thesis or dissertation, and want to learn how to access it or for more information about readership statistics, contact us at STARS@ucf.edu

Graduation Date

2020

Semester

Spring

Advisor

Fathpour, Sasan

Degree

Doctor of Philosophy (Ph.D.)

College

College of Engineering and Computer Science

Department

Electrical and Computer Engineering

Degree Program

Electrical Engineering

Format

application/pdf

Identifier

CFE0007966; DP0023107

URL

https://purls.library.ucf.edu/go/DP0023107

Language

English

Release Date

May 2020

Length of Campus-only Access

None

Access Status

Doctoral Dissertation (Open Access)

Download

Share

COinS