Silicon based photonic crystal light sources
Abstract/Contents
- Abstract
- Efficient light generation on silicon is desirable for a variety of applications because of its low fabrication cost relative to III/V semiconductors and because it will enable monolithic integration with electronic components on the same Si platform. We studied silicon-rich silicon nitride with emission in the visible and erbium-doped silicon nitride (Er:SiNx) with emission at 1540 nm. Both of these materials are compatible with the mainstream complementary metal-oxide semiconductor (CMOS) processing technology. This thesis discuses our results on using photonic crystal (PC) cavities to enhance luminescence from these materials. Nano-resonators modify the optical density of states (DOS) to enhance the emission in a fundamentally different way than what is accessible through materials engineering. Specifically, photon emission rate can be enhanced at a particular wavelength because the optical DOS is higher at the cavity resonance, which in turn improves efficiency and allows faster modulation rates. We have demonstrated up to 11-fold enhancement at photonic crystal resonance relative to smooth film at 730 nm and over 20-fold enhancement at 1540 nm. Time resolved measurements on erbium-doped sample confirmed significant enhancement of spontaneous emission rate. In addition, we have observed cavity line-width narrowing with increasing pump power in the erbium-doped sample, resulting from decrease in ground-state absorption by erbium ions as more of them are excited. We achieved excitation of up to 31% of Er ions at cryogenic temperature. This is an important step toward realizing a laser or amplifier based on Er:SiNx in the future.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2010 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Makarova, Maria Olegovna |
|---|---|
| Associated with | Stanford University, Department of Electrical Engineering |
| Primary advisor | Vuckovic, Jelena |
| Thesis advisor | Vuckovic, Jelena |
| Thesis advisor | Miller, D. A. B |
| Thesis advisor | Nishi, Yoshio, 1940- |
| Advisor | Miller, D. A. B |
| Advisor | Nishi, Yoshio, 1940- |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Maria Makarova. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2010. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2010 by Maria Olegovna Makarova
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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