Journal
IEEE PHOTONICS JOURNAL
Volume 6, Issue 4, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2014.2332473
Keywords
Microdisk resonator; slow light; silicon photonics; waveguide devices
Funding
- National Natural Science Foundation of China [61006045, 61376055, 61261130586]
- Major State Research Program of China [2013CB933303]
- Major State Basic Research Development Program of China [2010CB923204]
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We propose a scheme to utilize a multimode microdisk resonator in silicon controlled through free-carrier injection for continuous fast-to-slow light tuning. Two nearby resonant modes are employed, i.e., undercoupling and overcoupling. The optical properties of a device are analytically investigated considering the resonance spacing, bandwidth, and density change of free carriers. Pulse propagation simulations are implemented, and the pulse delay/advance is studied for wavelengths between the two resonances. As the density of injected free carriers increases, a continuous transition from fast to slow light occurs for a range of wavelengths. Consequently, a microdisk resonator in silicon is experimentally realized with the desired two resonances, exhibiting electrooptical tuning with a fast response. The experimental results agree well with the simulation in power transmission, and the tunable time delay and advance are also predicted.
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