Page 1 |
Save page Remove page | Previous | 1 of 144 | Next |
|
small (250x250 max)
medium (500x500 max)
large ( > 500x500)
Full Resolution
All (PDF)
|
This page
All
Subset |
ANALYSIS OF PHOTONIC CRYSTAL DOUBLE HETEROSTRUCTURE
RESONANT CAVITIES
by
Adam Mock
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(ELECTRICAL ENGINEERING)
August 2009
Copyright 2009 Adam Mock
Object Description
| Title | Analysis of photonic crystal double heterostructure resonant cavities |
| Author | Mock, Adam |
| Author email | amock77@yahoo.com; mock1ap@cmich.edu |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Electrical Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2009-06-01 |
| Date submitted | 2009 |
| Restricted until | Unrestricted |
| Date published | 2009-07-21 |
| Advisor (committee chair) | O'Brien, John |
| Advisor (committee member) |
Steier, William Nakano, Aiichiro |
| Abstract | Two-dimensional photonic crystals represent a versatile technology platform for constructing photonic integrated circuits. Low-loss and small footprint waveguides and cavities can be combined to make delay lines, modulators, filters and lasers for efficient optical signal processing. However, this diverse functionality comes at the expense of higher complexity in both the fabrication and the modeling of these devices. This Thesis discusses the finite-difference time-domain numerical modeling of large quality factor photonic crystal cavities for chip-scale laser applications.; In Chapter 2 the role of the quality factor in estimating laser threshold is derived starting from Maxwell's equations. Expressions for modal loss and gain are derived. Chapter 3 discusses methods for extracting the quality factor from finite-difference time-domain simulations. Even with large-scale parallel computing, only a short record of the time evolution of the fields can be recorded. To get around this issue, Pade functions are fitted to the available data in the frequency domain.; Once the analysis tools have been described and demonstrated, they are applied to the photonic crystal double heterostructure cavity which has been shown to have quality factors in excess of one million and mode volumes on the order of a cubic wavelength. A detailed description of the spectral and modal properties of heterostructure cavities is presented, and a method for mode discrimination is discussed.; The effect of heat sinking dielectric lower substrates on the optical loss of the heterostructure cavity is investigated, and it is seen that the quality factor is significantly reduced as the index of the lower substrate is increased. A modified heterostructure cavity with glide plane symmetry is shown to have significantly reduced out-of-plane leakage. An optimized design is proposed for continuous wave edge-emitting laser operation.; Finally, a novel approach for laser simulation is introduced in which a material gain model is included in the finite-difference time-domain simulation. The effects of spatially varying gain distributions are investigated and agree well with the modal gain derivation in Chapter 2. |
| Keyword | photonics; photonic crystals; finite-difference time-domain; laser; semiconductor; resonator; cavity; optics; photonic integrated circuit |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m2382 |
| Rights | Mock, Adam |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Mock-3011 |
| Archival file | uscthesesreloadpub_Volume32/etd-Mock-3011.pdf |
Description
| Title | Page 1 |
| Full text | ANALYSIS OF PHOTONIC CRYSTAL DOUBLE HETEROSTRUCTURE RESONANT CAVITIES by Adam Mock A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (ELECTRICAL ENGINEERING) August 2009 Copyright 2009 Adam Mock |
Comments
Post a Comment for Page 1
