In this paper we review our recent progress in two complementary approaches to photodetectors on silicon photonic chips for on-chip optical interconnection applications, namely epitaxially grown III-V-on-silicon and all-silicon microcavity-enhanced photodetectors, both for the 1550nm wavelengths. On the epitaxially grown III-V-on-silicon photodetectors front, we have demonstrated both normal-incidence and waveguide-butt-coupled p-i-n photodetectors. We simulate the silicon waveguide butt-coupling to the InGaAs absorption region and estimate the absorption efficiency using a three-dimensional finite-difference time-domain method. We optimize the InGaAs absorption region in order to attain a bandwidth of 46 GHz. We also report our latest experimental demonstration of all-silicon microresonator enhanced linear-absorption photodetectors using defect-state absorption in pn-diode-integrated microresonators. Our initial experiments reveal the measured bandwidths to be exceeding 10 GHz.
Silicon photonics using microdisk and microring resonators are finding technologically important applications from
telecommunications and on-chip optical interconnects to optofluidics and biosensing. Silicon-based microresonators that
partially confine light by total internal reflection are versatile device structures which are highly wavelength-selective,
reconfigurable via various refractive index tuning mechanisms, micrometer-scale footprint, and readily in/out-coupled
with integrated waveguides. In this paper, we will highlight our latest progress in silicon photonics using microdisk and
microring resonators for on-chip optical interconnects, optofluidics and biosensing applications including the
experimental demonstrations of: (i) optical time delay and advance using silicon microring resonators integrated with pi-
n diodes; (ii) photocurrent spectroscopy of microdisk resonators using two-photon-absorption induced photocarriers;
(iii) optical trapping and transporting of microparticles using a water-clad silicon nitride microring resonator; and (iv)
coupled microdisk resonator optical waveguide-based refractive index sensors.
We review our recent work on silicon photonic devices for on-chip optical interconnects and optofluidics. On the optical
interconnects front, we demonstrate coupled-resonator optical waveguides with gapless inter-cavity coupling for on-chip
wide-bandwidth high-order optical channel filters and optical delay lines. We propose a 5×5 matrix switch comprising
two-dimensionally cascaded microring resonator-based electrooptic switches for network-on-chip applications and
demonstrate a 2×2 matrix switch as a proof-of-concept. We demonstrate cavity-enhanced photocurrent generation in a
p-i-n diode embedded microring resonator for wavelength-selective photodetection and monitoring on-chip optical
networks. We also investigate a serial-cascaded double-microring-based silicon photonic circuit for high-speed on-chip
clock-recovery applications. On the optofluidics front, we study silicon nitride based waveguides with integrated
microfluidic channels for optical manipulation of microparticles.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.