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

2011/07/24 by Arka Majumdar, Erik D. Kim, Jelena Vučković +1 · 4 citations
Engineering · Physics and Astronomy · #Photonic Crystals and Applications #Photonic and Optical Devices #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevb.84.195304

arxiv created 2011/07/24 · openalex publication_date 2011/11/04 · arxiv updated 2012/03/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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 \ensuremath∼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.

Citations

• Linewidth broadening of a quantum dot coupled to an off-resonant cavity

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