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.
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TL;DR: In this article, a neodymium-doped toroid microlaser and a reference laser are used to detect analytes with high sensitivity, and the resulting beat signal is analyzed on an electrical spectrum analyzer.
Abstract: Optical microcavity sensors have demonstrated success in detecting analytes with high sensitivity. Typically, the sensor output is monitored using oscilloscopes or optical spectrum analyzers; however, these instruments can significantly limit the sensing performance. In the present work, we address this limitation by developing a neodymium-doped toroid microlaser and heterodyning it with a reference laser. The resulting beat signal is analyzed on an electrical spectrum analyzer. By performing comparative temperature sensing experiments, we demonstrate that the heterodyning improves the detection limit over 60-fold while also improving the temporal resolution and the signal to noise ratio up to 50-fold.
27 citations
TL;DR: In this paper, it is demonstrated that silicon when rendered low dimensional, e.g. in form of nanocrystals or quantum wires, can be turned into an active photonic materials which shows light amplification characteristics, non-linear optical effects, photon confinement in both one and two dimensions, photon trapping with evidences of light localization, and gas sensing properties.
27 citations
TL;DR: In this paper, the spectral properties of planar microcavities as a function of the observation numerical aperture (NA) were investigated and a semi-empirical model was developed.
27 citations
TL;DR: In this article, the authors presented a new concept of entangled photon generation via biexciton from a quantum-well embedded in a microcavity, where the coupled states of the bieciton and cavity photons played an important role in the entangled photon generator.
Abstract: We present a new concept of entangled photon generation via biexciton from a quantum-well embedded in a microcavity. The coupled states of the biexciton and cavity photons play an important role in the entangled photon generation. In fact, a suitable design of the level scheme of the coupled states can considerably enhance the generation process. We present the optimal condition for entangled photon generation in terms of the biexcitonic cavity quantum electrodynamics (QED).
27 citations
TL;DR: In this paper, it was shown that, for single-molecule strong coupling with the photon mode, nonadiabatic molecular dynamics produces mixing of polariton manifolds with differing number of excitations, without the need of counter-rotating light-matter coupling terms.
Abstract: Quantum dynamics of the photoisomerization of a single 3,3'-diethyl-2,2'-thiacynine iodide molecule embedded in an optical microcavity was theoretically studied. The molecular model consisting of two electronic states and the reaction coordinate was coupled to a single cavity mode via the quantum Rabi Hamiltonian, and the corresponding time-dependent Schrodinger equation starting with a purely molecular excitation was solved using the Multiconfigurational Time-Dependent Hartree Method (MCTDH). We show that, for single-molecule strong coupling with the photon mode, nonadiabatic molecular dynamics produces mixing of polariton manifolds with differing number of excitations, without the need of counter-rotating light-matter coupling terms. Therefore, an electronic excitation of the molecule at the cis configuration is followed by the generation of two photons in the trans configuration upon isomerization. Conditions for this phenomenon to be operating in the collective strong light-matter coupling regime are discussed and found to be unfeasible for the present system, based on simulations of two molecules inside the microcavity. Yet, our finding suggests a new mechanism that, without ultrastrong coupling, achieves photon down-conversion by exploiting the emergent molecular dynamics arising in polaritonic architectures.
27 citations