Title :
All-optical switching using microring resonators including Quantum-Dots
Author :
Rostami, A. ; Baghban, H. ; Khalafi, A. ; Rasooli, H. ; Ghanbari, A. ; Janabi-Sharifi, F.
Author_Institution :
Fac. of Electr. & Comput. Eng., Univ. of Tabriz, Tabriz, Iran
Abstract :
In this article a Quantum Dots based method is proposed to enhance the nonlinear switching properties of a bulk GaAs/AlGaAs microring resonator. Switching is accomplished in the pump and probe configuration. Refractive index changes in the microring due to free carriers generated by two photon absorption are used to switch the probe beam in and out of resonance. It has been concluded that quantum dot doping would lead to higher nonlinearity and faster evolution in refractive index variation. A control pulse is applied to the structure to control the carrier lifetime and therefore manage the switching time.
Keywords :
III-V semiconductors; aluminium compounds; carrier lifetime; gallium arsenide; micro-optics; optical pumping; optical resonators; optical switches; photoexcitation; refractive index; semiconductor quantum dots; two-photon processes; GaAs-AlGaAs; carrier lifetime; control pulse; free carrier generation; microring resonators; nonlinear switching; optical switching; pump probe configuration; quantum dot doping; refractive index; two photon absorption; Equations; Mathematical model; Optical ring resonators; Optical switches; Probes; All-optical switching; Quantum-dot microring; numerical simulation; probe and control; pump; two-photon absorption;
Conference_Titel :
Optomechatronic Technologies (ISOT), 2010 International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-7684-8
DOI :
10.1109/ISOT.2010.5687367
