Theory of polariton-mediated Raman scattering in microcavities

Hilario, L. M. León; Bruchhausen, A. E.; Lobos, Alejandro M.; Aligia, A. A.

doi:10.1088/0953-8984/19/17/176210

Cited by 7 publications

(13 citation statements)

References 16 publications

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“…Bare life time broadening are obtained from a fitting procedure and the effects of the exciton lifetime in relation to the cavity-polariton lifetime are discussed. An important improvement to the previously presented theoretical approaches 23,24 to describe the experimental observations quantitatively is obtained in the present work by accounting also for the second type of experiment, which provides additional severe constrains to the unknown parameters of the theory.…”

Section: Introductionmentioning

confidence: 93%

Microcavity exciton-polariton mediated Raman scattering: Experiments and theory

et al. 2008

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International audienceWe studied the intensity of resonant Raman scattering due to optical phonons in a planar II-VI-type semiconductor microcavity in the regime of strong coupling between light and matter. Two different sets of independent experiments were performed at near outgoing resonance with the middle polariton (MP) branch of the cavity. In the first, the Stokes-shifted photons were kept at exact resonance with the MP, varying the photonic or excitonic character of the polariton. In the second, only the incoming light wavelength was varied, and the resonant profile of the inelastic scattered intensity was studied when the system was tuned out of the resonant condition. Taking some matrix elements as free parameters, both independent experiments are quantitatively described by a model which incorporates lifetime effects in both excitons and photons, and the coupling of the cavity photons to the electron-hole continuum. The model is solved using a Green's function approach which treats the exciton-photon coupling nonperturbatively

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Section: Introductionmentioning

confidence: 93%

Microcavity exciton-polariton mediated Raman scattering: Experiments and theory

et al. 2008

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“…|A ν s f | 2 ρ(ω) where ρ(ω) = j ρ j j (ω) is the density of final states, which can be calculated using the relation ρ j j (ω) = − 1 π ImG j j (ω), and where we have neglected the dependence of T i on frequency [11]. The quantities A ν j can straightforwardly be calculated as |A ν s j | 2 = ρ j j (ω)/ρ(ω).…”

Section: Modelmentioning

confidence: 99%

“…When ω is chosen in such a way that the resonance condition for the outgoing polariton is fulfilled, we obtain [11] I = ρ f f (ω)ρ e,e (ω) ρ f f (ω) + ρ e,e (ω)…”

Section: Modelmentioning

confidence: 99%

“…This corresponds to vertical transitions in which the light promotes a valence electron with 2D wavevector k to the conduction band with the same wavevector. Using the effective-mass approximation we obtain [11]…”

Section: Modelmentioning

confidence: 99%

“…In this work we describe the effects of including the coupling with the electron-hole continuum, and the damping effects in RRS as mentioned in reference [11]. We consider a system where only two exciton-polariton branches are observed [8], which means that only the 1s exciton plays an important role.…”

Section: Introductionmentioning

confidence: 99%

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Polariton-mediated Raman scattering in microcavities: A Green’s function approach

Hilario¹,

Aligia²,

Lobos³

et al. 2008

Superlattices and Microstructures

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Vibrational Strong Light–Matter Coupling Using a Wavelength-Tunable Mid-infrared Open Microcavity

et al. 2017

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An open microcavity (OMC) is an optical system that is composed of two mirrors, where one is fixed and the second is on a movable stage. OMCs enable tuning the optical resonances of the system and insertion of different materials between the mirrors and are therefore of large scientific interest due to their many potential applications. Strong light–matter coupling of the vibrational transitions of organic molecules with the optical modes of a microcavity generates new polaritonic states in the mid-infrared (mid-IR) spectral region. Here we achieve strong light–matter coupling in the mid-IR using a low optical-loss OMC that is wavelength-tunable via a piezoelectric actuator. A thin film of poly(methyl methacrylate) (PMMA) was deposited onto one of the mirrors to couple the narrow and intense absorption peak of the carbonyl stretch mode at 1731 cm–1 to the OMC. Polaritonic states are observed in FTIR transmission measurements when an OMC resonance is matched to the carbonyl stretch. By dynamically varying the cavity photon mode around the resonance condition, we determine the normal mode polariton dispersion relation and obtain a maximum Rabi-splitting ℏΩR = 7.0 ± 0.18 meV. Different cavity line widths and Rabi-splittings can be achieved by changing the mirror separation, thus providing control of the coupling strength relative to dephasing. The ability to insert multiple materials inside an OMC and generate strong light–matter coupling over a large range of wavelengths can open new paths toward chemical reaction modification and energy transfer studies in the mid-IR.

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Theory of polariton-mediated Raman scattering in microcavities

Cited by 7 publications

References 16 publications

Microcavity exciton-polariton mediated Raman scattering: Experiments and theory

Microcavity exciton-polariton mediated Raman scattering: Experiments and theory

Polariton-mediated Raman scattering in microcavities: A Green’s function approach

Vibrational Strong Light–Matter Coupling Using a Wavelength-Tunable Mid-infrared Open Microcavity

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