Silicon-based photonic, plasmonic, and optomechanic devices
Abstract/Contents
- Abstract
- The integration of optical devices and electronic devices on the same platform is currently a gateway into many research and practical applications. Because silicon and silicon compatible materials have dominated electronic development, optical devices must also conform to the silicon platform. One of the greatest challenges in building such an integrated opto-electronic system is the development of an efficient Si-compatible light emitter. In this thesis, we develop several Si-based nano-photonic devices for the control of light at the nano-scales. However, several Si-compatible materials and light emitters have low index of refraction, and high degrees of confinement using only index contrast and total internal reflection is difficult. We design high quality (Q-) factor photonic crystal nanobeam cavities for a variety of materials with low index, such as silicon dioxide, silicon rich oxide, and silicon nitride, all with high Q sand low mode volumes. We employ these cavity designs to a variety of active materials, including Si-nanocrystal doped silicon oxide, Er-doped amorphous silicon nitride, and InAs quantum quantum dots in GaAs. By placing emitters in these ultrasmall, high-Q cavities, we demonstrate that the cavity enhances emission and absorption processes, such as free carrier absorption, gain, and lasing. We also design plasmonic cavity and grating structures, which have lower Q compared to photonic crystal cavities due to metal ohmic losses, but have low mode volumes that break the diffraction limit. We propose and study a planar distributed Bragg reflector plasmonic cavity analogous to the nanobeam photonic cavity. We also demonstrate the enhancement of emission from silicon nanocrystals coupled to wide area plasmonic grating modes and Er-doped silicon nitride coupled to metal-insulator-metal modes confined between two metal layers. We demonstrate the control of emission wavelength by changing the device dimensions in both cases, and in the case of the Er material, observe an order of magnitude increase in collected emission compared to a sample with only one side contacting the metal. Finally, we demonstrate resonant actuation of a mechanical mode with optical gradient forces in a Si nanobeam cavity. The optical cavity enhances the optomechanical coupling between the optical mode and the mechanical vibration, and enables detectable mechanical motions with small optical powers driving an optical cavity mode.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Copyright date | 2011 |
| Publication date | 2010, c2011; 2010 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Gong, Yiyang |
|---|---|
| Associated with | Stanford University, Department of Electrical Engineering |
| Primary advisor | Vuckovic, Jelena |
| Thesis advisor | Vuckovic, Jelena |
| Thesis advisor | Fan, Shanhui, 1972- |
| Thesis advisor | Miller, D. A. B |
| Advisor | Fan, Shanhui, 1972- |
| Advisor | Miller, D. A. B |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Yiyang Gong. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2011. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2011 by Yiyang Gong
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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