Open AccessOptical properties of new wide heterogeneous waveguides with thermo optical shifters
Author(s) -
Francesco De Leonardis,
А.В. Царев,
Vittorio M. N. Passaro
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.021333
Subject(s) - silicon on insulator , materials science , waveguide , optics , silicon , optical switch , optoelectronics , silicon photonics , absorption (acoustics) , core (optical fiber) , phase (matter) , physics , quantum mechanics
We present analysis and simulation of novel silicon-on-insulator (SOI) heterogeneous waveguides with thermo-optic phase shifters. New structure design contains a p-n junction on both sides of SOI ridge waveguide with 220 nm x 35 microm silicon core. Strongly mode-dependent optical losses (by additional free charge absorption) provide quasi-singe-mode behavior of wide waveguide with mode size approximately 10 microm. Local heater produces an efficient phase shifting by small temperature increase (DeltaT approximately 2K), switching power (< 40 mW) and switching time (< 10 micros). Mode optical losses are significantly decreased at high heating (DeltaT approximately 120 K).