Two-photon-absorption photodiodes in Si photonic-crystal slow-light waveguides
We demonstrate two-photon-absorption photodiodes in Si photonic-crystal waveguides, which shows wideband low-dispersion slow light. The device was fabricated on SOI substrate by CMOS-compatible process. The responsivity was improved by higher group indexes of slow light up to 0.052 A/W for pulses at...
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Veröffentlicht in: | Applied physics letters 2013-01, Vol.102 (3) |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We demonstrate two-photon-absorption photodiodes in Si photonic-crystal waveguides, which shows wideband low-dispersion slow light. The device was fabricated on SOI substrate by CMOS-compatible process. The responsivity was improved by higher group indexes of slow light up to 0.052 A/W for pulses at wavelengths around 1550 nm with a 2.7 ps width and sub-watt peak powers. We applied this device to an optical correlator and dispersion detector. In the former, the correlation waveforms of 0.7−10 ps pulses were observed with small errors. In the latter, photocurrents inversely proportional to the pulse width were detected. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.4789393 |