Properties of quantum dots coupled to plasmons and optical cavities

Abstract

Quantum electrodynamics is rapidly finding a set of new applications in thresholdless lasing, photochemistry, and quantum entanglement due to the development of sophisticated patterning techniques to couple nanoscale photonic emitters with photonic and plasmonic cavities. Colloidal and epitaxial semiconductor nanocrystals or quantum dots (QDs) are promising candidates for emitters within these architectures but are dramatically less explored in this role than are molecular emitters. This perspective reviews the basic physics of emitter-cavity coupling in the weak-to-strong coupling regimes, describes common architectures for these systems, and lists possible applications (in particular, photochemistry), with a focus on the advantages and issues associated with using QDs as the emitters.

Polariton-Mediated Electron Transfer via Cavity Quantum Electrodynamics

“…Here, the "matter" part of the system contains a colloidal nanocrystal (NC) particle and an organic acceptor molecule. 86 Note that the figure is out of proportion for the size of the cavity and NC. The actual size of the NC is ∼ 2 nm 47 and the quantized distance in the FP cavity is ∼ 210 nm forhω c = 3.0 eV.…”

The structural and luminescence properties of plexcitonic structures based on Ag2S/l-Cys quantum dots and Au nanorods

“…[1][2][3][4][5][6][7][8][9] In recent years, techniques for controlling the luminescence properties of QDs by plasmon-exciton interaction have been actively developed. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] It has been found that the "hybrid" luminescence properties of these nanostructures are unique due to their strong dependence on the features of the direct interaction between components of plasmon-exciton nanostructures, the distance between them, matching of spectral resonances, etc. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] The plasmon-exciton interaction provides a basis for changing the probabilities of radiative and nonradiative tran...…”

“…[9][10][11]28 In most situations described in the literature, QDs with exciton luminescence are considered. [10][11][12][13][14][15][17][18][19][21][22][23][24][25] Under conditions of signicant overlap of QD luminescence and extinction bands of plasmonic nanoparticles (NPs), processes of electronic excitation exchange, in particular, nonradiative energy transfer from QDs to plasmonic NPs, play a signicant role in the plasmon-exciton interaction; [29][30][31] charge phototransfer is also an important effect in these systems. 32,33 Thus, in some situations, the changes in the parameters of QD luminescence do not have an obvious interpretation.…”

“…[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] It has been found that the "hybrid" luminescence properties of these nanostructures are unique due to their strong dependence on the features of the direct interaction between components of plasmon-exciton nanostructures, the distance between them, matching of spectral resonances, etc. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] The plasmon-exciton interaction provides a basis for changing the probabilities of radiative and nonradiative transitions in QDs due to the Purcell effect, transforming the shape of extinction and luminescence spectra of QDs as a result of the Rabi splitting, making Fano quantum interference possible. [9][10][11][12][13][14][15][16]…”

Single Photon Emitters Coupled to Plasmonic Waveguides: A Review

“…Colloidal QDs are promising for quantum technologolies. [56] The QDs were deposited near the apexes of wedge waveguides by using electro-hydro-dynamic (EHD) printing. Even single QD can be deposited using this technique, as can be seen in Figure 3j.…”