Bulletin of Pure & Applied Sciences- Physics
  • Year: 2020
  • Volume: 39d
  • Issue: 2

Excitation transfer between distant quantum dots in photonic crystal waveguide

1University Department of Physics, B.R.A. Bihar University, Muzaffarpur, Bihar842001, India. E-mail: mrajjubilee@gmail.com

2P. G. Department of Physics, Rajendra College, Chapra, J.P. University, Chapra, Bihar841301, India. E-mail: ravi301ind@gmail.com

*Corresponding author: Sanjeev Kumar. P. G. Department of Physics, Rajendra College, Chapra, J.P. University, Chapra, Bihar841301, India. E-mail: ravi301ind@gmail.com

Abstract

We have theoretically studied the excitation transfer between distant quantum dots in a photonic crystal waveguide. Due to Anderson localization of disordered position and size of the photonic crystal holes was found to have a highly nontrivial effect on the interaction. We have simulated realistic systems with different magnitudes of the disorder and showed that while localization indeed has a profound effect on both range and magnitude of the dot-dot excitation transfer rate at several |im distance. The average excitation transfer rate was found to be larger than 10μev at distance on the order of 10μm. The transfer time to this corresponded was on the order of 10 ps, close to the single qubit operation time and much shorter than the decoherence time measured. The obtained results were found in good agreement with previous results.

Keywords

Excitation transfer, Quantum Dot, Waveguide, Photonic Crystal, Anderson Localization, Interaction, Simulation