Implementation scheme for quantum controlled phase-flip gate through quantum dot in slow-light photonic crystal waveguide

Implementation scheme for quantum controlled phase-flip gate through quantum dot in slow-light photonic crystal waveguide

We propose a scheme to realize controlled phase gate between two single photons through a single quantum dot in a slow-light photonic crystal waveguide. Enhanced Purcell factor and large -factor lead to high gate fidelity over broadband frequencies compared to cavity-assisted system. The excellent physical integration of this photonic crystal waveguide system provides tremendous potential for l...

Slow light in quantum dot photonic crystal waveguides

Slow-Light in Nonuniform Quantum Dot Waveguide

We analyzed a new variable all-optical buffer using semiconductor quantum dots (QD). We show that an Ids-InGaAs-GaAs QD waveguide with 20meV inhomogeneous linewidth can achieve substantial buffering with a novel unbalanced multi-wavelength pumping scheme. Introduction: The advancement of 111-V semiconductor quantum dots (QD) has made many interesting applications, such as ultra-low threshold di...

Waveguide-coupled photonic crystal cavity for quantum dot spin readout.

We present a waveguide-coupled photonic crystal H1 cavity structure in which the orthogonal dipole modes couple to spatially separated photonic crystal waveguides. Coupling of each cavity mode to its respective waveguide with equal efficiency is achieved by adjusting the position and orientation of the waveguides. The behavior of the optimized device is experimentally verified for where the cav...

Waveguide-Coupled Photonic Crystal Cavity for Quantum Dot Spin Readout

We present a waveguide-coupled photonic crystal H1 cavity structure in which the orthogonal dipole modes couple to spatially separated photonic crystal waveguides. Coupling of each cavity mode to its respective waveguide with equal efficiency is achieved by adjusting the position and orientation of the waveguides. The behavior of the optimized device is experimentally verified for where the cav...