Topic
Optical microcavity
About: Optical microcavity is a research topic. Over the lifetime, 2599 publications have been published within this topic receiving 72125 citations. The topic is also known as: optical microcavities.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this article, the fluorescence of individual silicon vacancy centers in nanodiamonds is coupled to a tunable optical microcavity to demonstrate a single photon source with high efficiency, increased emission rate, and improved spectral purity compared to the intrinsic emitter properties.
Abstract: Single photon sources are an integral part of various quantum technologies, and solid state quantum emitters at room temperature appear as a promising implementation. We couple the fluorescence of individual silicon vacancy centers in nanodiamonds to a tunable optical microcavity to demonstrate a single photon source with high efficiency, increased emission rate, and improved spectral purity compared to the intrinsic emitter properties. We use a fiber-based microcavity with a mode volume as small as $3.4~\lambda^3$ and a quality factor of $1.9\times 10^4$ and observe an effective Purcell factor of up to 9.2. We furthermore study modifications of the internal rate dynamics and propose a rate model that closely agrees with the measurements. We observe lifetime changes of up to 31%, limited by the finite quantum efficiency of the emitters studied here. With improved materials, our achieved parameters predict single photon rates beyond 1 GHz.
64 citations
••
TL;DR: In this paper, the spontaneous emission of a material can be controlled by placing it in a micron-sized optical cavity, and the authors discuss the realization, the physics and perspective applications of all porous silicon microcavities.
64 citations
••
TL;DR: In this paper, the authors demonstrate amplification of 200-fs pulses in a quantum-dot (QD) semiconductor amplifier over a spectral range that exceeds 100 nm, and demonstrate that such QD devices can provide amplification of femtosecond pulses over a spectrum that exceeds 1000 nm.
Abstract: We demonstrate amplification (> 18 dB) of 200-fs pulses in a quantum-dot (QD) semiconductor amplifier. Our measurements have shown that such QD devices can provide amplification of femtosecond pulses over a spectral range that exceeds 100 nm.
63 citations
••
TL;DR: In this paper, rotation of the plane of polarization of light in a microcavity parametric oscillator was observed and quantitatively described by a quantum model, which takes into account polariton-polariton scattering, longitudinal-transverse splitting, and self-induced Larmor precession.
Abstract: We observe rotation of the plane of polarization of light in a microcavity parametric oscillator. The angle between the signal and pump polarizations ranges from 60\ifmmode^\circ\else\textdegree\fi{} to 120\ifmmode^\circ\else\textdegree\fi{} and depends strongly on the orientation of the pump polarization. Conversion of linear to circular polarization is detected for certain orientations of the pump polarization and shows a strong correlation with the rotation of the linear polarization. These effects are quantitatively described by a quantum model, which takes into account polariton-polariton scattering, longitudinal-transverse splitting, and self-induced Larmor precession. Evidence for an in-plane field oriented away from the main optical axes is found.
63 citations
••
TL;DR: It is shown that the photon energy loss from optical gap to open-circuit voltage can be reduced to unprecedented values by embedding organic solar cells in optical microcavities, simply by manipulating the device architecture.
Abstract: Strong light-matter coupling can re-arrange the exciton energies in organic semiconductors. Here, we exploit strong coupling by embedding a fullerene-free organic solar cell (OSC) photo-active layer into an optical microcavity, leading to the formation of polariton peaks and a red-shift of the optical gap. At the same time, the open-circuit voltage of the device remains unaffected. This leads to reduced photon energy losses for the low-energy polaritons and a steepening of the absorption edge. While strong coupling reduces the optical gap, the energy of the charge-transfer state is not affected for large driving force donor-acceptor systems. Interestingly, this implies that strong coupling can be exploited in OSCs to reduce the driving force for electron transfer, without chemical or microstructural modifications of the photo-active layer. Our work demonstrates that the processes determining voltage losses in OSCs can now be tuned, and reduced to unprecedented values, simply by manipulating the device architecture.
63 citations