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We demonstrate optical power monitoring using a silicon resistor enabled by the surface and defect states-induced photoconductance effect. Ultrahigh optical power detection sensitivity of −40 dBm under a low AC drive voltage of 5 mV is obtained with the facilitation of a lock-in amplifier circuitry. The detection scheme is applied to monitor the resonances in single and coupled-ring resonators. Intracavity...
We investigate two-photon absorption (TPA) induced photocurrent generation in a microdisk resonator embedded with interleaved p-n junctions. Due to the strong electric field across the p-n junctions, free-carrier recombination rate is considerably reduced leading to an increased photocurrent.
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