Suppression of Surface-Related Loss in a Gated Semiconductor Microcavity

Najer, Daniel; Tomm, Natasha; Javadi, Alisa; Korsch, Alexander R.; Petrak, Benjamin; Riedel, Daniel; Dolique, V.; Valentin, Sascha R.; Schott, Rüdiger; Wieck, A. D.; Ludwig, Arne; Warburton, Richard J.

doi:10.1103/physrevapplied.15.044004

Cited by 17 publications

(14 citation statements)

References 32 publications

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“…By comparing κ to the cavity losses reported in Ref. [32], which were measured with the same bottom mirror but with a highly reflective top mirror, we conclude that κ ≈ κ top (κ top describes the cavity losses through the top mirror), i.e. close to all losses arise via transmission through top mirror for all wavelengths, assuring that the cavity is indeed one-sided in the full range of wavelengths presented.…”

Section: Microcavity and Quantum Dot Characterisation A Characterisat...mentioning

confidence: 61%

A chiral one-dimensional atom using a quantum dot in an open microcavity

Antoniadis¹,

Tomm²,

Jakubczyk³

et al. 2021

Preprint

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Section: Microcavity and Quantum Dot Characterisation A Characterisat...mentioning

confidence: 61%

A chiral one-dimensional atom using a quantum dot in an open microcavity

Antoniadis¹,

Tomm²,

Jakubczyk³

et al. 2021

Preprint

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“…Deposition of SiO 2 (n = 1.47) or Al 2 O 3 (n = 1.77) will also reduce the losses due to scattering. We note that surface passivation has previously been demonstrated to increase the Q-factor for GaAs resonators [72,93,97] albeit via a different mechanism.…”

Section: Discussionmentioning

confidence: 76%

“…Alternatively, changing the resonant λ changes the standing wave inside the cavity. As scattering and absorption depend on the amplitude of the electric field, tuning the field maxima across the diamond-air interface may reveal the source of surface loss [93].…”

Section: Results On Q-factormentioning

confidence: 99%

High quality-factor diamond-confined open microcavity

Flågan,

Riedel,

Javadi

et al. 2021

Preprint

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With a highly coherent, optically addressable electron spin, the nitrogen vacancy (NV) centre in diamond is a promising candidate for a node in a quantum network. However, the NV centre is a poor source of coherent single photons owing to a long radiative lifetime, a small branching ratio into the zero-phonon line (ZPL) and a poor extraction efficiency out of the high-index host material. In principle, these three shortcomings can be addressed by resonant coupling to a single mode of an optical cavity. Utilising the weak-coupling regime of cavity electrodynamics, resonant coupling between the ZPL and a single cavity-mode enhances the transition rate and branching ratio into the ZPL. Furthermore, the cavity channels the light into a well-defined mode thereby facilitating detection with external optics. Here, we present an open Fabry-Perot microcavity geometry containing a single-crystal diamond membrane, which operates in a regime where the vacuum electric field is strongly confined to the diamond membrane. There is a field anti-node at the diamond-air interface. Despite the presence of surface losses, quality factors exceeding 120 000 and a finesse F = 11 500 were observed. We investigate the interplay between different loss mechanisms, and the impact these loss channels have on the performance of the cavity. This analysis suggests that the "waviness" (roughness with a spatial frequency comparable to that of the microcavity mode) is the mechanism preventing the quality factors from reaching even higher values. Finally, we apply the extracted cavity parameters to the NV centre and calculate a predicted Purcell factor exceeding 150.

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“…We employ 14 (15) λ c /4 layers of a SiO 2 /Ta 2 O 5 distributed Bragg reflector for the curved top (planar bottom) mirrors. From a white-light transmission measurement [33,36,71], the center of the stopband of the top mirror is determined to be λ c = 625 nm (Fig. 1 (c)).…”

Section: Appendix 1 Methodsmentioning

confidence: 99%

Widely-tunable, doubly-resonant Raman scattering on diamond in an open microcavity

Flågan,

Maletinsky,

Warburton

et al. 2021

Preprint

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Raman lasers based on bulk diamond are a valuable resource for generating coherent light in wavelength regimes where no common laser diodes are available. Nevertheless, the widespread use of such lasers is limited by their high threshold power requirements on the order of several Watts. Using on-chip microresonators, a significant reduction of the lasing threshold by more than two orders of magnitude has been shown. However, these resonators lack a continuous tuning mechanism and, mainly due to fabrication limitations, their implementation in the visible remains elusive. Here, we propose a platform for a diamond Raman laser in the visible. The device is based on a miniaturized, open-access Fabry-Perot cavity. Our microcavity provides widely-tunable doubly-resonant enhancement of Raman scattering from high quality single-crystalline diamond. We demonstrate a >THz continuous tuning range of doubly-resonant Raman scattering, a range limited only by the reflective stopband of the mirrors. Based on the experimentally determined quality factors exceeding 300 000, our theoretical analysis suggests that, with realistic improvements, a sub-mW threshold is readily within reach. Our findings pave the way to the creation of a universal low-power frequency shifter, a potentially valuable addition to the nonlinear optics toolbox.

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Suppression of Surface-Related Loss in a Gated Semiconductor Microcavity

Cited by 17 publications

References 32 publications

A chiral one-dimensional atom using a quantum dot in an open microcavity

A chiral one-dimensional atom using a quantum dot in an open microcavity

High quality-factor diamond-confined open microcavity

Widely-tunable, doubly-resonant Raman scattering on diamond in an open microcavity

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