Ultralow threshold electrically pumped photonic crystal lasers
Abstract/Contents
- Abstract
- The advantages of shrinking the cavity of a semiconductor laser to volumes on the order of the wavelength of light and below were realized more than 20 years ago. Within the last decade there has been extensive work developing techniques for confining light in nanoscale cavities such as photonic crystals and plasmonics. It is now considered relatively easy to demonstrate semiconductor nanocavity lasers where greater than 10% of the spontaneous emission is coupled to the laser mode, and researchers have recently been able to demonstrate nanolasers where the active volume consists of a single quantum dot. It has been predicted that these lasers will open up many applications such as on-chip optical interconnects, optical computing, photonic integrated circuits, high sensitivity optical sensors, in addition to novel physics. Before the work described in this thesis, the performance of optically pumped nanolasers was orders of magnitude better than electrically pumped devices due to the difficulty of efficient electrical pumping of nanoscale optical cavities. The main result of this thesis is the development of a practical and efficient way to electrically pump photonic crystal nanocavity lasers and other photonic crystal nanocavity devices (modulators, resonant cavity LEDs etc). Using this technique we were able to demonstrate a laser with a threshold of only 181nA at 50K, the lowest threshold ever observed in any type of electrically pumped laser. The design shows great promise for high speed operation, and we experimentally show that quantum dot photonic crystal lasers can achieve modulation rates of 30GHz and study the factors limiting the maximum modulation rate.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2012 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Ellis, Bryan Christopher |
|---|---|
| Associated with | Stanford University, Department of Electrical Engineering |
| Primary advisor | Vuckovic, Jelena |
| Thesis advisor | Vuckovic, Jelena |
| Thesis advisor | Harris, J. S. (James Stewart), 1942- |
| Thesis advisor | Miller, D. A. B |
| Advisor | Harris, J. S. (James Stewart), 1942- |
| Advisor | Miller, D. A. B |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Bryan Ellis. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Ph.D. Stanford University 2012 |
| Location | electronic resource |
Access conditions
- Copyright
- © 2012 by Bryan Christopher Ellis
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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