Effect of photogenerated carriers on the spectral diffusion of a quantum dot coupled to a photonic crystal cavity

Arka Majumdar, Erik D. Kim, and Jelena Vučković
Phys. Rev. B 84, 195304 – Published 4 November 2011

Abstract

We experimentally observe the effect of photogenerated carriers on the spectral diffusion of a quantum dot (QD) coupled to a photonic crystal (PC) cavity. In this system, spectral diffusion arises in part from charge fluctuations on the etched surfaces of the PC. We find that these fluctuations may be suppressed by photogenerated carriers, leading to a reduction of the measured QD linewidth by a factor of 2 compared to the case where the photogenerated carriers are not present. This result demonstrates a possible means of countering the effects of spectral diffusion in QD-PC cavity systems and thus may be useful for quantum information applications where narrow QD linewidths are desired.

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  • Received 23 July 2011

DOI:https://doi.org/10.1103/PhysRevB.84.195304

©2011 American Physical Society

Authors & Affiliations

Arka Majumdar*, Erik D. Kim, and Jelena Vučković

  • E.L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA

  • *arkam@stanford.edu

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Issue

Vol. 84, Iss. 19 — 15 November 2011

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