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    Self-sustained gigahertz electronic oscillations in ultrahigh-Q photonic microresonators

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    COPE_184.pdf (464.3Kb)
    Date
    2012-05
    Author
    Soltani, Mohammad
    Yegnanarayanan, Siva
    Li, Qing
    Eftekhar, Ali Asghar
    Adibi, Ali
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    Abstract
    We report on theoretical and experimental observations of self-sustained fast [gigahertz (GHz)] electronic oscillations resulting from coupled electron-photon dynamics in ultrahigh-Q Si microdisk resonators with cw pumping. Our theoretical analysis identifies conditions for generating steady-state GHz oscillations while suppressing thermal oscillations [megahertz (MHz)] with submilliwatt input laser power. Such fast oscillations are tunable via changing the free-carrier (FC) lifetime of the resonator. Integrating a p-i-n diode with these high-Q resonators for controlling the FC lifetime promises the realization of an integrated voltage-controlled oscillator (VCO) in a silicon photonics chip.
    URI
    http://hdl.handle.net/1853/46213
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