Radiatively Broadened Incandescent Sources

Huppert, Simon; Vasanelli, Angela; Laurent, T.; Todorov, Yanko; Pegolotti, Giulia; Beaudoin, G.; Sagnes, I.; Sirtori, Carlo

doi:10.1021/acsphotonics.5b00415

Cited by 17 publications

(23 citation statements)

References 30 publications

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“…In order to prove the physical interpretation of our experimental observations, we have extended the nonperturbative model developed in previous work [18,21], which was based on a single infinitely thin charged plane, to a distribution of QWs in the z-direction. This model relies on quantum Langevin equations, describing the dynamics of plasmons, coupled with an electronic and a photonic bath, as schematized in the top panel of figure 3.…”

Section: Quantum Modelmentioning

confidence: 84%

“…Furthermore, a second resonance at 185 » meV, associated with an excited multisubband plasmon mode [20], is much more apparent in the MQW than in the SQW sample. Finally, the total incandescence signal of MQW device (directly related to absorption by Kirchhoff's law [21]) is only twice the SQW one. This is a strong evidence that, contrary to the low angle case, light-matter interaction is not perturbative and has to be described by an exact model [18].…”

Section: Resultsmentioning

confidence: 99%

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Cooperative Lamb shift and superradiance in an optoelectronic device

et al. 2017

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When a single excitation is shared between a large number of two-level systems, a strong enhancement of the spontaneous emission appears. This phenomenon is known as superradiance. This enhanced rate can be accompanied by a shift of the emission frequency, the cooperative Lamb shift, issued from the exchange of virtual photons between the emitters. In this work we present a semiconductor optoelectronic device allowing the observation of these two phenomena at room temperature. We demonstrate experimentally and theoretically that plasma oscillations in spatially separated quantum wells interact through real and virtual photon exchange. This gives rise to a superradiant mode displaying a large cooperative Lamb shift.

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Section: Quantum Modelmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Cooperative Lamb shift and superradiance in an optoelectronic device

et al. 2017

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“…In order to reach high angles, without dealing with saturated absorption for the main plasmon peak, we have performed angle resolved emission experiments under thermal excitation of the plasmon through the application of an in-plane current, as in ref. 33. The experiment has been performed on a Having confirmed our microscopic approach through the comparison between experimental and theoretical results, we discuss in the last part of this paper how electronic confinement and tunnel coupling can be used as a degree of freedom to engineer the plasmonic resonances.…”

mentioning

confidence: 76%

Semiconductor quantum plasmonics

Vasanelli

Huppert

Haky

et al. 2019

2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

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We investigate the frontier between classical and quantum plasmonics in highly doped semiconductor layers. The choice of a semiconductor platform instead of metals for our study permits an accurate description of the quantum nature of the electrons constituting the plasmonic response, which is a crucial requirement for quantum plasmonics. In particular we show that our quantum model permits to calculate the collective plasmonic resonances from the electronic states determined by an arbitrary one-dimensional potential. Furthermore, it allows us to analytically demonstrate the Lindhard formula in the limit of a vanishing confinement. Our approach is corroborated with experimental spectra in which higher order longitudinal plasmonic modes are present. This work opens the way towards the applicability of quantum engineering techniques for semiconductor plasmonics.

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“…Note that, if the QW is placed close to a metallic mirror, the transmissivity becomes zero at ω = ω 0 while the absorptivity is unity. The system thus displays total absorption at the MSP frequency 17 . As shown in fig.…”

Section: Optical Properties Of Superradiant Modesmentioning

confidence: 99%

“…The model presented above has been successfully applied to reproduce plasmon emission experiments in which the two-dimensional electron gas is excited by an in-plane current in a device based on a field effect transistor geometry where the emitted light is extracted through a polished facet 17 . In particular our model has accurately predicted the variations of the incandescent emission spectrum with the emission angle and the electronic density.…”

Section: El Imentioning

confidence: 99%

Strong and ultrastrong coupling with free-space radiation

et al. 2016

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Strong and ultra-strong light-matter coupling are remarkable phenomena of quantum electrodynamics occurring when the interaction between a matter excitation and the electromagnetic field cannot be described by usual perturbation theory. This is generally achieved by coupling an excitation with large oscillator strength to the confined electromagnetic mode of an optical microcavity. In this work we demonstrate that strong/ultra-strong coupling can also take place in the absence of optical confinement. We have studied the non-perturbative spontaneous emission of collective excitations in a dense two-dimensional electron gas that supperradiantly decays into free space. By using a quantum model based on the input-output formalism, we have derived the linear optical properties of the coupled system and demonstrated that its eigenstates are mixed light-matter particles, like in any system displaying strong or ultra-strong light-matter interaction. Moreover, we have shown that in the ultra-strong coupling regime, i.e. when the radiative broadening is comparable to the matter excitation energy, the commonly used rotating-wave and Markov approximations yield unphysical results. Finally, the input-output formalism has allowed us to prove that Kirchhoff's law, describing thermal emission properties, applies to our system in all the light-matter coupling regimes considered in this work.

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Radiatively Broadened Incandescent Sources

Cited by 17 publications

References 30 publications

Cooperative Lamb shift and superradiance in an optoelectronic device

Cooperative Lamb shift and superradiance in an optoelectronic device

Semiconductor quantum plasmonics

Strong and ultrastrong coupling with free-space radiation

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