Title :
Nonlinear Photonics in AlGaAs Photonics Nanowires: Self Phase and Cross Phase Modulation
Author :
Duchesne, David ; Morandotti, Roberto ; Siviloglou, Georgios A. ; El-Ganainy, Ramy ; Stegeman, George I. ; Christodoulides, Demetrios N. ; Modotto, Daniele ; Locatelli, Andrea ; De Angelis, Costantino ; Pozzi, Francesca ; Sorel, Marc
Author_Institution :
Univ. du Quebec, Varennes
fDate :
July 30 2007-Aug. 2 2007
Abstract :
AlGaAs nanowires are ideal waveguides for the observation of nonlinear effects. The sub-micron geometry and tight field confinement, due to the high index contrast between core and cladding, yield very intense pulsed beams at low power levels. Observations of Kerr nonlinearities are thus possible at power levels of a few watts in just a few millimeters of propagation. By using pulses of 52 W of peak power we obtain a 0.9pi nonlinear phase shift from self-phase modulation. By way of cross-polarised co-propagating pulses we also obtain a cross-phase modulation to self-phase modulation ratio of 0.88 at 1557 nm. Nonlinear transmission arising from three photon absorption is also analysed. We find good agreement between our experimental results and those from our simulations based on a nonlinear Schrodinger model. These results may eventually lead to the development of nonlinear all-optical devices operating in sub-micrometer interaction lengths with but a few watts of power.
Keywords :
III-V semiconductors; Schrodinger equation; aluminium compounds; gallium arsenide; light polarisation; nanowires; nonlinear differential equations; optical Kerr effect; optical waveguides; self-phase modulation; semiconductor quantum wires; AlGaAs; AlGaAs nanowires; Kerr nonlinearities; copropagating pulses; cross phase modulation; cross-polarised pulses; high index contrast; ideal waveguides; intense pulsed beams; nonlinear Schrodinger model; nonlinear all-optical devices; nonlinear effects; nonlinear phase shift; nonlinear photonics; nonlinear transmission; photonic nanowires; power 52 W; self phase modulation; submicrometer interaction lengths; submicron geometry; tight field confinement; wavelength 1557 nm; Etching; Gallium arsenide; Nanowires; Nonlinear optics; Optical modulation; Optical pumping; Optical waveguides; Phase modulation; Photonics; Pulse modulation; Nonlinear wave propagation; Optical losses; Optical waveguides; Phase modulation; Self focusing;
Conference_Titel :
Signals, Systems and Electronics, 2007. ISSSE '07. International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-1448-2
Electronic_ISBN :
1-4244-1449-0
DOI :
10.1109/ISSSE.2007.4294516