Direct and third-body mediated resonance energy transfer in dimensionally constrained nanostructures

Weeraddana, Dilusha; Premaratne, Malin; Andrews, Davıd L.

doi:10.1103/physrevb.92.035128

Cited by 42 publications

(36 citation statements)

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“…k the reduced Plank's constant, ρ is the density of final states of the acceptor, M (2) ,M (4) are second and fourth order coupling matrix elements respectively. Furthermore, the third term represents the quantum interference of the RET process and signifies the controllability of the RET due to the laser field.…”

Section: (A) (D) the Results Demonstrate That Even For Moderate Lasmentioning

confidence: 99%

“…OPTICALLY CONTROLLED RET Since the RET process is fully quantum mechanical in nature, it can be formally described within the framework of quantum electrodynamics (QED) [3], [4]. We first derived the optically controlled RET rate for QDs by using the second and fourth order time dependent perturbation theory, and by applying the Fermi's golden rule [3], Γ laser = Fig.…”

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confidence: 99%

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Optical control of resonance energy transfer in quantum dot systems

Weeraddana

Premaratne

Andrews

2016

2016 IEEE Nanotechnology Materials and Devices Conference (NMDC)

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Abstract-We demonstrate that the rate of resonance energy transfer can be extensively controlled through an applied offresonant radiation field under favourable physical configurations of the quantum dots. I. INTRODUCTIONNanotechnology offers means to study and fabricate atomlike nanostructures with discrete energy transitions, which arise from band splitting due to the quantum confinement effect, commonly termed quantum dots (QDs). Thus, quantum dots are becoming increasingly prominent at the very heart of modern nanophotonics [1], [2]. Moreover, the excitonexciton interactions through nonradiative resonance energy transfer (RET) in QDs has enabled exciting opportunities in many applications. It emerges that a throughput off-resonant laser beam can produce significant additional effects on the process of RET between two nanoparticles [5]. This is due

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Section: (A) (D) the Results Demonstrate That Even For Moderate Lasmentioning

confidence: 99%

mentioning

confidence: 99%

Optical control of resonance energy transfer in quantum dot systems

Weeraddana

Premaratne

Andrews

2016

2016 IEEE Nanotechnology Materials and Devices Conference (NMDC)

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“…Within the abstraction of reduced dimensionality, for instance, this is certainly the case 19,20 . Twodimensional RET has an R −4 near-field fall off with separation, while its one-dimensional counterpart is not sensitive to separation at all.…”

Section: Introductionmentioning

confidence: 99%

Electric dipole coupling in optical cavities and its implications for energy transfer, up-conversion, and pooling

LaCount

Lusk

2016

Phys. Rev. A

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Resonant energy transfer, energy transfer upconversion, and energy pooling are considered within optical cavities to elucidate the relationship between exciton dynamics and donor/acceptor separation distance. This is accomplished using perturbation theory to derive analytic expressions for the electric dipole coupling tensors of perfect planar and rectangular channel reflectors-directly related to a number of important energy transfer processes. In the near field, the separation dependence along the cavity axis is not influenced by the cavity and is essentially the same as for three-dimensional, free space. This is in sharp contrast to the reduced sensitivity to separation found in idealized low-dimensional settings. The cavity dynamics only correspond to their reduced dimensional counterparts in the far field where such excitonic processes are not typically of interest. There is an intermediate regime, though, where sufficiently small cavities cause a substantial decrease in separation sensitivity that results in one component of the dipole-dipole coupling tensor being much larger than those of free space.1 arXiv:1602.09048v3 [quant-ph]

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“…In recent work 5 we have developed a framework of quantum electrodynamics (QED) 6,7 to address Raman scattering influenced by a second, neighboring molecule; this is one of many situations in which such a theory of fundamental coupling is applied. [8][9][10][11][12][13][14][15][16] Our interest is not only in the modification of line intensities (beyond the familiar heterogeneous spectral broadening): we have shown that it is possible to engender additional spectra lines that are not conventionally Raman active, identifying the constraints that apply. The symmetry aspects of the latter feature are the focus of the present work.…”

Section: Introductionmentioning

confidence: 99%

Symmetry analysis of Raman scattering mediated by neighboring molecules

Williams

Andrews

2016

The Journal of Chemical Physics

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Raman spectroscopy is a key technique for the identification and structural interrogation of molecules. It generally exploits changes in vibrational state within individual molecules which produce, in the scattered light, frequencies that are absent in the incident light. Considered as a quantum optical process, each Raman scattering event involves the concurrent annihilation and creation of photons of two differing radiation modes, accompanying vibrational excitation or decay. For molecules of sufficiently high symmetry, certain transitions may be forbidden by the two-photon selection rules, such that corresponding frequency shifts may not appear in the scattered light. By further developing the theory on a formal basis detailed in other recent work [J. Chem. Phys. 144, 174304 (2016)], the present analysis now addresses cases in which expected selection rule limitations are removed as a result of the electronic interactions between neighboring molecules. In consequence, new vibrational lines may appear -even some odd parity (ungerade) vibrations may then participate in the Raman process. Subtle differences arise according to whether the input and output photon events occur at either the same or different molecules, mediated by intermolecular interactions. For closely neighboring molecules, within near-field displacement distances, it emerges that the radiant intensity of Raman scattering can have various inverse-power dependences on separation distance. A focus is given here to the newly permitted symmetries, and the results include an extended list of irreducible representations for each point group in which such behavior can arise.

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Direct and third-body mediated resonance energy transfer in dimensionally constrained nanostructures

Cited by 42 publications

References 40 publications

Optical control of resonance energy transfer in quantum dot systems

Optical control of resonance energy transfer in quantum dot systems

Electric dipole coupling in optical cavities and its implications for energy transfer, up-conversion, and pooling

Symmetry analysis of Raman scattering mediated by neighboring molecules

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