Increased pump acceptance bandwidth in spontaneous parametric downconversion process using Bragg reflection waveguides

Krishna Thyagarajan (1) , Ritwick Das (1) , Olivier Alibart (2) , Marc de Micheli (2) , Daniel Barry Ostrowsky (2) , Sébastien Tanzilli (2)

1 IIT - Department of Physics [New Delhi]
2 LPMC - Laboratoire de physique de la matière condensée

In this paper we show that by suitably tailoring the dispersion characteristics of a Bragg reflection waveguide (BRW) mode, it is possible to achieve efficient photon pair generation over a large pump bandwidth while maintaining narrow signal bandwidth. The structure proposed consists of a high index core BRW with a periodically poled GaN core and periodically stratified cladding made up of alternate layers of Al0.02Ga0.98N and Al0.45Ga0.55N. Such photon-pair generators should find applications in realizing compact and stable sources for quantum information processing.

Domaines: Autre [cond-mat.other]

Krishna Thyagarajan, Ritwick Das, Olivier Alibart, Marc de Micheli, Daniel Barry Ostrowsky, et al.. Increased pump acceptance bandwidth in spontaneous parametric downconversion process using Bragg reflection waveguides. Optics Express, 2008, 16 (6), pp.3577-3582. ⟨10.1364/OE.16.003577⟩. ⟨hal-00438478⟩