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 paper, a numerical analysis of Fabry-Perot optical cavities with Gaussian-shape mirrors formed between tips of optical fibers is presented, and the effect of the mode mixing on the coherent atom-cavity coupling as well as the mode matching between the cavity and a single-mode optical fiber is investigated.
Abstract: We present a systematic numerical study of Fabry-Perot optical cavities with Gaussian-shape mirrors formed between tips of opticalfibers. Such cavities can be fabricated by laser machining of fiber tips and are promising systems for achieving strong coupling between atomic particles and an optical field as required for quantum information applications. Using a mode mixing matrix method, we analyze the cavity optical eigenmodes and corresponding losses depending on a range of cavity-shape parameters, such as mirror radius of curvature, indentation depth and cavity length. The Gaussian shape of the mirrors causes mixing of optical modes in the cavity. We investigate the effect of the mode mixing on the coherent atom-cavity coupling as well as the mode matching between the cavity and a single-mode optical fiber. While the mode mixing is associated with increased cavity losses, it can also lead to an enhancement of the local optical field. We demonstrate that around the resonance between the fundamental and 2nd order Laguerre-Gaussian modes of the cavity it is possible to obtain 50% enhancement of the atom-cavity coupling at the cavity center while still maintaining low cavity losses and high cavity-fiber optical coupling.
12 citations
TL;DR: In this article, the emission spectrum of a quantum dot embedded in a (e.g. photonic crystal) nanocavity is modeled using a semi-classical approach to describe the matter-field interaction.
Abstract: We model the emission spectrum of a quantum dot embedded in a (e.g. photonic crystal) nanocavity, using a semi-classical approach to describe the matter-field interaction. We start from the simple model of a quantum dot as a two-level system, and recover the result expected from cavity quantum electrodynamics. Then, we study the influence of electron-acoustic-phonons interaction. We show that the surrounding semiconductor plays an essential role in the emission spectrum in strong coupling.
12 citations
TL;DR: In this paper, the influence of carrier relaxation on the emission dynamics of a semiconductor microcavity laser was investigated using femtosecond optical excitation, and it was shown that the dynamics of the output laser pulse becomes significantly slower when the photon energy of the pump laser is tuned from the quantum well band-gap energy towards higher energies.
Abstract: The influence of carrier relaxation on the emission dynamics of a semiconductor microcavity laser is investigated using femtosecond optical excitation. For moderate excitation intensities, the dynamics of the output laser pulse becomes significantly slower when the photon energy of the pump laser is tuned from the quantum well band-gap energy towards higher energies. Theoretical calculations reproduce this trend only if the interaction-induced dephasing of the polarization driven by the pump pulse, the formation, and relaxation of the nonequilibrium carrier distribution as well as the chirp of the excitation pulse are taken into account. Additionally, band-structure effects such as excitation of light holes influence the thermalization dynamics and lead to discontinuities in the general trend.
12 citations
24 May 2000
TL;DR: In this article, a vertical-cavity surface-emitting laser (VCSEL) based free space parallel optical interconnect is presented, where the rigid optical link interconnects bi-directionally two PCBs over a distance of 3 inches.
Abstract: A vertical-cavity surface-emitting laser (VCSEL) based free- space parallel optical interconnect is presented. The rigid optical link interconnects bi-directionally two PCBs over a distance of 3 inches. The 512 optical channels were grouped in 4 by 8 clusters on a 750-micrometers pitch, where each cluster is a 4 by 4 array of channels on a 125-micrometers pitch. Modules combining both microlenses and minilenses were used to propagate light from the VCSELs to the detectors. Details of the optical design and assembly process are presented.17© (2000) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
12 citations
TL;DR: In this article, the authors show that most features in 2D-IR spectra of vibrational polaritons can be explained by a linear superposition of this background signal and the true polariton response.
Abstract: Strong coupling between vibrational transitions in molecules within a resonant optical microcavity leads to the formation of collective, delocalized vibrational polaritons. There are many potential applications of "polaritonic chemistry", ranging from modified chemical reactivity to quantum information processing. One challenge in obtaining the polaritonic response is removing a background contribution due to the uncoupled molecules that generate an ordinary 2D-IR spectrum whose amplitude is filtered by the polariton transmission spectrum. We show that most features in 2D-IR spectra of vibrational polaritons can be explained by a linear superposition of this background signal and the true polariton response. Through a straightforward correction procedure, in which the filtered bare-molecule 2D-IR spectrum is subtracted from the measured cavity response, we recover the polaritonic spectrum.
12 citations