INTEGRATED SILICON-BASED NONLINEAR PHOTODETECTOR
First Claim
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1. A system comprising:
- an integrated silicon-based structure comprising an optical waveguide for receiving an input beam carrying an optical signal and a microcavity optically coupled to the waveguide and configured to receive optical energy from the input beam and absorb the optical energy by a nonlinear multi-photon absorption process,the integrated silicon-based structure further comprising electrodes responsive to the nonlinear multi-photon absorption process in the microcavity for producing an electronic signal indicative of the optical signal.
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Abstract
Disclosed is a system including an integrated silicon-based structure including a microcavity configured to receive optical energy from an input beam carrying an optical signal and absorb the optical energy by a nonlinear multi-photon absorption process. For example, the multi-photon absorption process can be two-photon absorption (TPA). The integrated silicon-based structure further includes electrodes responsive to the nonlinear multi-photon absorption process in the microcavity for producing an electronic signal indicative of the optical signal. A related method is also disclosed.
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Citations
42 Claims
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1. A system comprising:
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an integrated silicon-based structure comprising an optical waveguide for receiving an input beam carrying an optical signal and a microcavity optically coupled to the waveguide and configured to receive optical energy from the input beam and absorb the optical energy by a nonlinear multi-photon absorption process, the integrated silicon-based structure further comprising electrodes responsive to the nonlinear multi-photon absorption process in the microcavity for producing an electronic signal indicative of the optical signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 32, 34, 40)
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16. A method comprising:
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directing an input beam carrying an optical signal into an optical waveguide of an integrated silicon-based structure, the integrated silicon-based structure further comprising a microcavity optically coupled to the waveguide; receiving optical energy in the microcavity from the input beam and absorbing the optical energy in the microcavity by a nonlinear multi-photon absorption process; and producing an electronic signal in response to the nonlinear multi-photon absorption process in the microcavity, the electrical signal indicative of the optical signal. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 33, 35, 41, 42)
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31. Apparatus comprising:
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an integrated silicon-based structure comprising an optical waveguide for receiving an input beam carrying an optical signal and a microcavity optically coupled to the waveguide and configured to receive optical energy from the input beam and absorb the optical energy by a nonlinear multi-photon absorption process, the integrated silicon-based structure further comprising electrodes responsive to the nonlinear multi-photon absorption process in the microcavity for producing an electronic signal indicative of the optical signal, wherein the microcavity comprises silicon and wherein the nonlinear multi-photon absorption process is in the silicon, and wherein the microcavity has a resonant frequency ω
0, a quality factor Q, and a modal volume VMODE, and wherein the input beam carrying the optical signal has a wavelength in air equal to λ
AIR, with 1.2 μ
m<
λ
AIR<
2.4 μ
m, and wherein Q>
100 and VMODE<
1000 λ
AIR3.
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36. A system comprising:
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an integrated silicon-based structure comprising a microcavity configured to receive optical energy from an input beam carrying an optical signal and absorb the optical energy by a nonlinear multi-photon absorption process, the integrated silicon-based structure further comprising electrodes responsive to the nonlinear multi-photon absorption process in the microcavity for producing an electronic signal indicative of the optical signal, wherein the microcavity comprises silicon and wherein the nonlinear multi-photon absorption process is in the silicon. - View Dependent Claims (37)
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38. A method comprising:
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directing an input beam carrying an optical signal into an integrated silicon-based structure comprising a microcavity; receiving optical energy in the microcavity from the input beam and absorbing the optical energy in the microcavity by a nonlinear multi-photon absorption process; and producing an electronic signal in response to the nonlinear multi-photon absorption process in the microcavity, the electrical signal indicative of the optical signal, wherein the microcavity comprises silicon and wherein the nonlinear multi-photon absorption process is in the silicon. - View Dependent Claims (39)
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Specification