CaltechTHESIS
  A Caltech Library Service

Integrated ultrafast nonlinear optical devices in silicon

Citation

Hochberg, Michael (2006) Integrated ultrafast nonlinear optical devices in silicon. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-05252006-160420

Abstract

Silicon-on-insulator (SOI) provides an intriguing system for developing massively integrated optics. By leveraging the processes and systems developed for electronics fabrication, it is possible to make highly repeatable devices where complexity can be scaled up through the use of wafer-scale batch fabrication. Because the mode concentration in silicon waveguides is two orders of magnitude higher than in fibers, it is possible to construct very compact nonlinear optical devices within this system, enabling the miniaturization and integration of ultrafast nonlinear devices. We have developed a library of devices, including both dielectric and plasmonic waveguides, as well as resonators, splitters, and a variety of other basic optical components.

Using these components to construct integrated devices of moderate complexity, we have demonstrated Pockels’ Effect-based ring modulators, optical rectification-based detectors, four-wave mixing devices, and ultrafast intensity modulators, which operate at speeds in excess of 2 Terahertz. By integrating optical polymers through evanescent coupling to high-mode-confinement silicon waveguides, the effective nonlinearity of the waveguides can be greatly increased. The combination of high mode confinement, multiple integrated optical components, and high nonlinearity produces all-optical ultrafast devices operating at power levels compatible with modern continuous-wave telecommunication systems. Although far from commercial modulator standards in terms of extinction, these modulator devices are a first step toward large scale integrated ultrafast optical logic in silicon, and are two orders of magnitude faster than existing free-carrier-based silicon devices.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Integrated Ultrafast; Nonlinear; Optical Devices; Silicon
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Applied Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Scherer, Axel
Thesis Committee:
  • Scherer, Axel (chair)
  • Yariv, Amnon
  • Rutledge, David B.
  • Doll, Theodore
  • Bridges, William B.
Defense Date:10 May 2006
Author Email:hochberg (AT) caltech.edu
Record Number:CaltechETD:etd-05252006-160420
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-05252006-160420
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2057
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:31 May 2006
Last Modified:26 Dec 2012 02:46

Thesis Files

[img]
Preview
PDF (thesis.pdf) - Final Version
See Usage Policy.

8Mb

Repository Staff Only: item control page