title: Optical properties of new wide heterogeneous waveguides with thermo optical shifters.
abstract: 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).
authors.affiliation: Photonics Research Group, Dipartimento di Ingegneria dell'Ambiente e per lo Sviluppo Sostenibile, Politecnico di Bari, viale del Turismo n. 8, 74100 Taranto, Italy. f.deleonardis@poliba.it
authors.forename: Francesco
authors.initials: F
authors.lastname: De Leonardis
authors.forename: Andrei V
authors.initials: AV
authors.lastname: Tsarev
authors.forename: Vittorio M
authors.initials: VM
authors.lastname: Passaro