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Spontaneous emission

About: Spontaneous emission is a research topic. Over the lifetime, 12855 publications have been published within this topic receiving 323684 citations.


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TL;DR: In this article, it was shown that InGaAs/GaAs semiconductor quantum boxes (QBs) open revolutionary opportunities for the application of the concepts of cavity quantum electrodynamics in monolithic microcavities.
Abstract: Spontaneous emission (SE) control in the solid state has been extensively studied for about 10 years as a route toward optoelectronic devices with improved properties or novel functionalities. Thanks to their atom-like emission and to their relatively large oscillator strength, InGaAs/GaAs semiconductor quantum boxes (QBs) open revolutionary opportunities for the application of the concepts of cavity quantum electrodynamics in monolithic microcavities. Such emitters experience in particular a very large enhancement of their spontaneous emission rate (Purcell effect) when inserted in high Q /low volume micropillars (×5) or microdisks (×15). This result opens unique opportunities for the development of solid-state photon guns, able to emit single-photon pulses in a deterministic way. QBs in microdisks should also allow in the near future to achieve a strong coupling regime for a single solid-state emitter.

92 citations

Journal ArticleDOI
TL;DR: In this article, the spontaneous emission of a dipole emitter imbedded into a layered metal-dielectric metamaterial was studied, and it was shown that the traditional effective medium approach greatly underestimates the value of the Purcell factor due to the presence of an effective nonlocality.

91 citations

Journal ArticleDOI
TL;DR: In this paper, it was shown that in ordered atomic arrays in free space, subradiant states acquire an interpretation in terms of optical modes that are guided by the array, which only emit due to scattering from the ends of the finite chain.
Abstract: A central goal within quantum optics is to realize efficient interactions between photons and atoms. A fundamental limit in nearly all applications based on such systems arises from spontaneous emission, in which photons are absorbed by atoms and then re-scattered into undesired channels. In typical treatments of atomic ensembles, it is assumed that this re-scattering occurs independently, and at a rate given by a single isolated atom, which in turn gives rise to standard limits of fidelity in applications such as quantum memories or quantum gates. However, this assumption can be violated. In particular, spontaneous emission of a collective atomic excitation can be significantly suppressed through strong interference in emission. Thus far the physics underlying the phenomenon of subradiance and techniques to exploit it have not been well-understood. In this work, we provide a comprehensive treatment of this problem. First, we show that in ordered atomic arrays in free space, subradiant states acquire an interpretation in terms of optical modes that are guided by the array, which only emit due to scattering from the ends of the finite chain. We also elucidate the properties of subradiant states in the many-excitation limit. Finally, we introduce the new concept of selective radiance. Whereas subradiant states experience a reduced coupling to all optical modes, selectively radiant states are tailored to simultaneously radiate efficiently into a desired channel while scattering into undesired channels is suppressed, thus enabling an enhanced atom-light interface. We show that these states naturally appear in chains of atoms coupled to nanophotonic structures, and we analyze the performance of photon storage exploiting such states. We find that selectively radiant states allow for a photon storage error that scales exponentially better with number of atoms than previously known bounds.

91 citations

Journal ArticleDOI
TL;DR: In this article, simultaneous amplified spontaneous emission from two different multiexcitonic transitions −1Se −1S3∕2 and 1Pe −1P3 ∕2− of colloidal CdSe nanocrystals (NCs) stabilized in high volume fraction in titania matrices was reported.
Abstract: We report simultaneous amplified spontaneous emission from two different multiexcitonic transitions −1Se–1S3∕2 and 1Pe–1P3∕2− of colloidal CdSe nanocrystals (NCs) stabilized in high volume fraction in titania matrices. Two-state lasing from both multiexcitonic transitions is achieved in a surface-emitting distributed feedback CdSe NC laser. Variable stripe length measurements show that the gain from the 1Pe–1P3∕2 transition is approximately twice that of the −1Se–1S3∕2 transition for 4.2nm radius CdSe∕ZnS core-shell NCs.

91 citations

Journal ArticleDOI
TL;DR: The electron-fed optical antennas described here are critical devices for interfacing electrons and photons, enabling thus the development of optical transceivers for on-chip wireless broadcasting of information at the nanoscale.
Abstract: Nanoscale electronics and photonics are among the most promising research areas providing functional nanocomponents for data transfer and signal processing. By adopting metal-based optical antennas...

91 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202383
2022213
2021360
2020338
2019419
2018453