Quantum-dot gain without inversion: Effects of dark plasmon-exciton hybridization

Abstract

We propose an initial-state-dependent quantum-dot gain without population inversion in the vicinity of a resonant metallic nanoparticle. The gain originates from the hybridization of a dark plasmon-exciton and is accompanied by efficient energy transfer from the nanoparticle to the quantum dot. This hybridization of the dark plasmon-exciton, attached to the hybridization of the bright plasmon-exciton, strengthens nonlinear light-quantum emitter interactions at the nanoscale, thus the spectral overlap between the dark and the bright plasmons enhances the gain effect. This hybrid system has potential applications in ultracompact tunable quantum devices.

Tailoring double Fano profiles with plasmon-assisted quantum interference in hybrid exciton-plasmon system

“…Distinct from our previous study, 13 the fourth pathway acting on the l QE 10 comes from l QE 20 , which is mediated by the B MNP and D MNP of the MNP. This is the origin of the quantum interference addressed in this work.…”

“…2 For a sufficiently small metallic nanoparticle (MNP) and sufficiently large induced dipole moment of the nearby QE, the interaction model includes the feedback setup. 3 In the framework with feedback, a lot of interesting optical phenomena has been reported, including the Fano lineshape of the absorption spectra, [3][4][5] sub-Poissonian statistics of emitted photons, 6 excitonic population transfer, 7,8 plasmon-induced transparency, 9,10 optical bistability, 11,12 QE gain without inversion, 13 undamped Rabi oscillation, 14 and optical sensing. 15,16 However, in these studies, only situations with only one transition channel interacting with the localized SPs were considered.…”

Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance

“…The ability of the medium to amplify the probe field is an inherent property of the system arising from the negative real part of polarizability for both GND and MNP at the energy of the localized surface plasmon resonance of GND induced by the probe field as shown in Figure 3 . Recently, the ability of plasmonic hybrid systems of demostrating gain without population inversion has been investigated in QD located in the vicinity of MNP [ 49 , 50 ]. It was shown that when such a system is exposed to a laser field and the distance between the quantum dot and the MNP is reduced beyond a critical value, a significant amount of gain without inversion is generated in the quantum dot [ 49 ].…”

Quadratic Electro-Optic Effect and Electro Absorption Process of Multi-layer Spherical Quantum Dot Enhanced by Metal Nanoparticle

“…In recent years, the interaction of quantum dots and metal nanoparticles (MNP) have been one of the most important subjects studied in hybrid structure [23][24][25][26][27][28] because the MNP strengthens the local field felt by the QD, which may enhance emission and luminescence [29]. Hybrid QD-MNP systems have been used for ultrahigh optical absorption and low electrical resistance at optoelectronic interfaces [30] and detect the possible signature of Majorana fermions [31], coherent controllable transport of a plasmonic waveguide [32], colorimetric measurements of DNA conjugations [33,34], laser systems without cavities [35][36][37], manipulation of heat generation in MPs [38,39], energy transfer processes in superstructures formed via bio-molecules [40], etc. Plasmonic field enhancement via MNPs has also been used for various device applications such as optical and plasmonic antennas [41][42][43][44], quantum nanosensor [45], nonlinear switching [46], and light emitting devices [47].…”