Title :
1.7-ps consecutive switching in an integrated multiple-quantum-well Y-junction optical switch
Author :
Kan´an, A.M. ; LiKamWa, Patrick ; Dutta, Mitra ; Pamulapati, Jagadeesh
Author_Institution :
Center for Res. in Electro-Opt. & Lasers, Univ. of Central Florida, Orlando, FL, USA
Abstract :
Ultrafast all-optical switching has been demonstrated in a Y-junction waveguide device fabricated on a GaAs-AlGaAs multiple quantum well structure. The mechanism responsible for switching is attributed to the optical Stark effect which enabled consecutive switching events spaced 1.7 ps apart. Carrier generation due to linear absorption of the band-tail states and the observed two-photon absorption results in a gradual slope in the background. Our experiments indicate that nonlinear refraction due to the AC Stark effect is most pronounced when the excitation field is polarized with the E-field parallel to the interfaces.
Keywords :
III-V semiconductors; Stark effect; aluminium compounds; demultiplexing equipment; gallium arsenide; high-speed optical techniques; integrated optics; molecular beam epitaxial growth; multiplexing equipment; optical communication equipment; optical fabrication; optical switches; optical waveguide components; semiconductor heterojunctions; semiconductor quantum wells; semiconductor switches; time division multiplexing; two-photon processes; 1.7 ps; AC Stark effect; E-field; GaAs-AlGaAs; Y-junction waveguide device; band-tail states; carrier generation; consecutive switching; excitation field; integrated multiple-quantum-well Y-junction optical switch; interfaces; linear absorption; multiple quantum well structure; nonlinear refraction; optical Stark effect; two-photon absorption; ultrafast all-optical switching; Absorption; Nonlinear optical devices; Nonlinear optics; Optical refraction; Optical switches; Optical waveguides; Polarization; Quantum well devices; Stark effect; Ultrafast optics;
Journal_Title :
Photonics Technology Letters, IEEE
