Coherent interactions in on-chip photonic-crystal cavities
Abstract/Contents
- Abstract
- There has been substantial interest in study of coherent interactions in on-chip photonic-crystal microcavities. Such efforts have recently led to realizations of important phenomena, including an all-optical analogue to electromagnetically induced transparency (EIT) and flat-top reflection filters. In this work, we demonstrate EIT-like and flat-top reflection optical resonances in a single on-chip photonic-crystal cavity structure. Most importantly, by tuning the index of refraction and thus the propagation phase in the waveguide between two cavities, we smoothly change the behavior of the structure from EIT-like to flat-top optical resonance. Both resonances are of great significance in applications. EIT-like optical resonance renders an integrated optical system transparent over a very narrow frequency range. The potential for slowing and stopping light on chip in such a system has profound impacts in both fundamental science and optical communications. Flat-top reflection filter, which reflects a narrow range of wavelengths while letting other wavelengths pass through, is a higher-order filter compared to the regular Lorentzian response commonly observed in photonic-crystal resonator filters. This box-like lineshape, featuring a flattened resonance and sharp transition from transmission band to reflection band, is important for achieving low inter-channel cross-talk in wavelength-division multiplexing. In addition, we show an optical analogue to the superradiance effect in photonic-crystal cavities. This work is along the direction of recent substantial interest and progress in mapping coherent effects in atomic systems to on-chip nanophotonics systems. But unlike the previous demonstration in atomic systems where emitters have to be placed within a distance smaller than a wavelength, the two resonators in our system can be separated by a distance much larger than a wavelength. It is enabled by the use of a waveguide to enforce the coherent interaction in a one-dimensional regime. The effect enhances waveguide-resonator coupling, which is essential for low loss device operation, so has broad implications for on-chip photonic integration. Moreover, using laser-pumped thermal differential tuning to align and detune cavity resonances, we experimentally demonstrate structural tuning of the superradiance effect in the system.
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 | Pan, Xuejun |
|---|---|
| Associated with | Stanford University, Department of Materials Science and Engineering |
| Primary advisor | Harris, J. S. (James Stewart), 1942- |
| Thesis advisor | Harris, J. S. (James Stewart), 1942- |
| Thesis advisor | Brongersma, Mark L |
| Thesis advisor | Fan, Shanhui, 1972- |
| Advisor | Brongersma, Mark L |
| Advisor | Fan, Shanhui, 1972- |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Pan Jun. |
|---|---|
| Note | Submitted to the Department of Material Science and Engineering. |
| Thesis | Ph. D. Stanford University 2010 |
| Location | electronic resource |
Access conditions
- Copyright
- © 2010 by Pan Jun
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