Silicon photonic resonator-enhanced defect-mediated photodiode for sub-bandgap detection

Optics Express
J K DoylendAndrew P Knights

Abstract

We describe, model and demonstrate a tunable micro-ring resonator integrated monolithically with a photodiode in a silicon waveguide device. The photodiode is made sensitive to wavelengths at and around 1550nm via the introduction of lattice damage through selective ion implantation. The ring resonator enhances detector responsivity in a 60 mum long waveguide photodiode such that it is 0.14 A/W at -10Vbias with less than 0.2 nA leakage current. The device is tunable such that resonance (and thus detection) can be achieved at any wavelength from 1510 - 1600 nm. We also demonstrate use of the device as a digital switch with integrated power monitoring, 20 dB extinction, and no optical power tapped from the output path to the photodiode. A theoretical description suggests that for a critically coupled resonator where the round trip loss is dominated by the excess defects used to mediate detection, the maximum responsivity is independent of device length. This leads to the possibility of extremely small detector geometries in silicon photonics with no requirement for the use of III-V materials or germanium.

References

Dec 21, 2004·Optics Letters·Dirk TaillaertRoel Baets
May 20, 2005·Nature·Qianfan XuMichal Lipson
Oct 15, 2008·Optics Express·D W ZhengM Asghari
Oct 2, 2006·Optics Express·Alexander W FangJohn E Bowers
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Citations

Feb 26, 2014·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Richard Soref
Jan 5, 2014·Nature Communications·Jonathan P MailoaTonio Buonassisi
Feb 13, 2014·Scientific Reports·Karan K MehtaRajeev J Ram
Aug 26, 2017·Sensors·Gyu-Seob JeongDeog-Kyoon Jeong
Dec 18, 2010·Optics Express·Laurent-Daniel HaretAlfredo De Rossi
Oct 10, 2013·Optics Express·Jason J AckertAndrew P Knights
Nov 21, 2012·Optics Letters·Hui YuWim Bogaerts
Nov 18, 2014·Optics Express·Sahba Talebi FardLukas Chrostowski
Jan 7, 2011·Optics Letters·Kyle PrestonMichal Lipson
Aug 25, 2020·Science Advances·Ajit K KatiyarJong-Hyun Ahn
Apr 24, 2013·Optics Express·Laurent-Daniel HaretAlfredo de Rossi
Jul 1, 2014·Optics Letters·Arka Majumdar, Armand Rundquist
Sep 22, 2011·Optics Express·J K DoylendA P Knights
Sep 17, 2020·Science Advances·Ajit K KatiyarJong-Hyun Ahn

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