Tuning the mode-splitting of a semiconductor microcavity with uniaxial stress

• URL: http://arxiv.org/abs/2102.09327v1
• Date: Thu, 18 Feb 2021 13:38:32 GMT
• Title: Tuning the mode-splitting of a semiconductor microcavity with uniaxial stress
• Authors: Natasha Tomm and Alexander R. Korsch and Alisa Javadi and Daniel Najer and R\"udiger Schott and Sascha R. Valentin and Andreas D. Wieck and Arne Ludwig and Richard J. Warburton
• Abstract summary: In this work we use an open microcavity composed of a "bottom" semiconductor distributed Bragg reflector (DBR) incorporating an n-i-p heterostructure. We demonstrate a reversible in-situ technique to tune the mode-splitting by applying uniaxial stress to the semiconductor DBR. A thorough study of the mode-splitting and its tuning across the stop-band leads to a quantitative understanding of the mechanism behind the results.
• Score: 49.212762955720706
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A splitting of the fundamental optical modes in micro/nano-cavities comprising semiconductor heterostructures is commonly observed. Given that this splitting plays an important role for the light-matter interaction and hence quantum technology applications, a method for controlling the mode-splitting is important. In this work we use an open microcavity composed of a "bottom" semiconductor distributed Bragg reflector (DBR) incorporating an n-i-p heterostructure, paired with a "top" curved dielectric DBR. We measure the mode-splitting as a function of wavelength across the stopband. We demonstrate a reversible in-situ technique to tune the mode-splitting by applying uniaxial stress to the semiconductor DBR. The method exploits the photoelastic effect of the semiconductor materials. We achieve a maximum tuning of $\sim$11 GHz. The stress applied to the heterostructure is determined by observing the photoluminescence of quantum dots embedded in the sample, converting a spectral shift to a stress via deformation potentials. A thorough study of the mode-splitting and its tuning across the stop-band leads to a quantitative understanding of the mechanism behind the results.

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