scholarly journals Complex plasmon-exciton dynamics revealed through quantum dot light emission in a nanocavity

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Satyendra Nath Gupta ◽  
Ora Bitton ◽  
Tomas Neuman ◽  
Ruben Esteban ◽  
Lev Chuntonov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Strong Coupling ◽  
Excited States ◽  
Light Emission ◽  
Strong Coupling Regime ◽  
Scattering Spectra ◽  
Experimental Findings ◽  
Coupling Phenomena ◽  
Sub Wavelength ◽  
Quantum Emitters

AbstractPlasmonic cavities can confine electromagnetic radiation to deep sub-wavelength regimes. This facilitates strong coupling phenomena to be observed at the limit of individual quantum emitters. Here, we report an extensive set of measurements of plasmonic cavities hosting one to a few semiconductor quantum dots. Scattering spectra show Rabi splitting, demonstrating that these devices are close to the strong coupling regime. Using Hanbury Brown and Twiss interferometry, we observe non-classical emission, allowing us to directly determine the number of emitters in each device. Surprising features in photoluminescence spectra point to the contribution of multiple excited states. Using model simulations based on an extended Jaynes-Cummings Hamiltonian, we find that the involvement of a dark state of the quantum dots explains the experimental findings. The coupling of quantum emitters to plasmonic cavities thus exposes complex relaxation pathways and emerges as an unconventional means to control dynamics of quantum states.

Towards strong-coupling regime in singular site-controlled InGaAs quantum dots-nanocavities

2021 ◽  
Author(s):  
Wei Liu ◽  
Jiahui Huang ◽  
Alessio Miranda ◽  
Benjamin Dwir ◽  
Alok Rudra ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Strong Coupling ◽  
Strong Coupling Regime

scholarly journals Polaritonics: from microcavities to sub-wavelength confinement

Nanophotonics ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 641-654 ◽  
Author(s):  
Dario Ballarini ◽  
Simone De Liberato
Keyword(s):  
Solid State ◽  
Strong Coupling ◽  
Quantum Electrodynamics ◽  
Cavity Quantum Electrodynamics ◽  
Atomic Systems ◽  
Figures Of Merit ◽  
Different Characteristics ◽  
Sub Wavelength ◽  
Quantum Emitters

AbstractFollowing the initial success of cavity quantum electrodynamics in atomic systems, strong coupling between light and matter excitations is now achieved in several solid-state set-ups. In those systems, the possibility to engineer quantum emitters and resonators with very different characteristics has allowed access to novel nonlinear and non-perturbative phenomena of both fundamental and applied interest. In this article, we will review some advances in the field of solid-state cavity quantum electrodynamics, focussing on the scaling of the relevant figures of merit in the transition from microcavities to sub-wavelength confinement.

scholarly journals Drastic transitions of excited state and coupling regime in all-inorganic perovskite microcavities characterized by exciton/plasmon hybrid natures

2022 ◽  
Vol 11 (1) ◽  
Author(s):  
Shuki Enomoto ◽  
Tomoya Tagami ◽  
Yusuke Ueda ◽  
Yuta Moriyama ◽  
Kentaro Fujiwara ◽  
...  
Keyword(s):  
Excited State ◽  
Strong Coupling ◽  
Light Emission ◽  
Excitation Density ◽  
Strong Coupling Regime ◽  
Material System ◽  
Inorganic Perovskite ◽  
Correlated Electron ◽  
Halide Perovskites ◽  
Laser Devices

AbstractLead-halide perovskites are highly promising for various optoelectronic applications, including laser devices. However, fundamental photophysics explaining the coherent-light emission from this material system is so intricate and often the subject of debate. Here, we systematically investigate photoluminescence properties of all-inorganic perovskite microcavity at room temperature and discuss the excited state and the light–matter coupling regime depending on excitation density. Angle-resolved photoluminescence clearly exhibits that the microcavity system shows a transition from weak coupling regime to strong coupling regime, revealing the increase in correlated electron–hole pairs. With pumping fluence above the threshold, the photoluminescence signal shows a lasing behavior with bosonic condensation characteristics, accompanied by long-range phase coherence. The excitation density required for the lasing behavior, however, is found to exceed the Mott density, excluding the exciton as the excited state. These results demonstrate that the polaritonic Bardeen–Cooper–Schrieffer state originates the strong coupling formation and the lasing behavior.

Optical spectra of organic quantum dots in the strong coupling regime

2010 ◽  
Vol 47 (1) ◽  
pp. 139-144 ◽  
Author(s):  
M. Arikan ◽  
R.T. Pepino ◽  
S. Ingvarsson ◽  
I. Shelykh
Keyword(s):  
Quantum Dots ◽  
Strong Coupling ◽  
Optical Spectra ◽  
Strong Coupling Regime

Silver Nanoshell Plasmonically Controlled Emission of Semiconductor Quantum Dots in the Strong Coupling Regime

ACS Nano ◽  
2016 ◽  
Vol 10 (4) ◽  
pp. 4154-4163 ◽  
Author(s):  
Ning Zhou ◽  
Meng Yuan ◽  
Yuhan Gao ◽  
Dongsheng Li ◽  
Deren Yang
Keyword(s):  
Quantum Dots ◽  
Strong Coupling ◽  
Semiconductor Quantum Dots ◽  
Strong Coupling Regime

scholarly journals Transition to strong coupling regime in hybrid plasmonic systems: exciton-induced transparency and Fano interference

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Tigran V. Shahbazyan
Keyword(s):  
Strong Coupling ◽  
Energy Exchange ◽  
Near Field ◽  
Plasmon Mode ◽  
Strong Coupling Regime ◽  
Field Coupling ◽  
Fano Interference ◽  
Scattering Spectra ◽  
Spectral Asymmetry ◽  
Induced Transparency

Abstract We present a microscopic model describing the transition to a strong coupling regime for an emitter resonantly coupled to a surface plasmon in a metal–dielectric structure. We demonstrate that the shape of scattering spectra is determined by an interplay of two distinct mechanisms. First is the near-field coupling between the emitter and the plasmon mode which underpins energy exchange between the system components and gives rise to exciton-induced transparency minimum in scattering spectra prior to the transition to a strong coupling regime. The second mechanism is the Fano interference between the plasmon dipole and the plasmon-induced emitter’s dipole as the system interacts with the radiation field. We show that the Fano interference can strongly affect the overall shape of scattering spectra, leading to the inversion of spectral asymmetry that was recently reported in the experiment.

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