Investigation of Purcell enhancement of quantum dots emitting in the telecom O-band with an open fiber-cavity
arxiv(2024)
摘要
Single-photon emitters integrated in optical micro-cavities are key elements
in quantum communication applications. However, for each combination of a
cavity geometry with a quantum emitter system, there are specific challenges in
the optimization of the emission properties and cavity-emitter interaction.
Here, we present a thorough investigation of semiconductor quantum dots (QDs),
emitting in the telecom O-band, integrated in an open fiber-cavity. The design
provides an optical micro-cavity tunable in all spatial dimensions with
intrinsic fiber-coupling. Consequently, it offers a promising approach to a
high collection efficiency and the investigation of spatially and spectrally
varying samples. On the other hand, the system is also susceptible to
vibrational noise. Therefore, we provide a comprehensive study of the cavity
and emitter properties together with an analysis of the fluctuations of the
cavity length. Due to the Purcell enhancement, we observe a reduction of the
decay times of up to a factor of 2.46(2).
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