Master thesis defense: Tangzhi Pang

External cavity filtering of Fano Photon Statistics from a Quantum dot couples to a Photonic Crystal Waveguide

This thesis studies Fano interference in single- and two-photon transport through a quantum dot (QD) coupled to a photonic crystal waveguide (PhCWG), with emphasis on how an external Fabry–Perot (FP) notch filter modifies the measured photon statistics. In a finite PhCWG, weak reflections at the interfaces form structural FP modes, which modulate the coherent background transmission and set the Fano working point. Interference between this background pathway and the resonance-assisted indirect pathway through the QD produces a Fano line shape in the transmitted field. At the two-photon level, the interference appears between an elastic product contribution and a nonlinear connected contribution. This makes it possible to move between bunched and antibunched transmitted light by changing the detuning between the QD and the laser and the internal background working point.