Increased pump acceptance bandwidth in spontaneous parametric downconversion process using Bragg reflection waveguides.
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 Al(0.02)Ga(0.98)N and Al(0.45)Ga(0.55)N. Such photon-pair generators should find applications in realizing compact and stable sources for quantum information processing.
Thyagarajan
Krishna
K
Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India. ktrajan@physics.iitd.ac.in
Das
Ritwick
R
Alibart
Olivier
O
de Micheli
Marc
M
Ostrowsky
Daniel B
DB
Tanzilli
Sébastien
S
D000669:Amplifiers, Electronic; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D009991:Oscillometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*