Giant photon bunching, superradiant pulse emission and excitation trapping in quantum-dot nanolasers

Abstract

Light is often characterized only by its classical properties, like intensity or coherence. When looking at its quantum properties, described by photon correlations, new information about the state of the matter generating the radiation can be revealed. In particular the difference between independent and entangled emitters, which is at the heart of quantum mechanics, can be made visible in the photon statistics of the emitted light. The well-studied phenomenon of superradiance occurs when quantum–mechanical correlations between the emitters are present. Notwithstanding, superradiance was previously demonstrated only in terms of classical light properties. Here, we provide the missing link between quantum correlations of the active material and photon correlations in the emitted radiation. We use the superradiance of quantum dots in a cavity-quantum electrodynamics laser to show a direct connection between superradiant pulse emission and distinctive changes in the photon correlation function. This directly demonstrates the importance of quantum–mechanical correlations and their transfer between carriers and photons in novel optoelectronic devices.

Intensified antibunching via feedback-induced quantum interference

“…Superradiance, a many emitter effect, has been shown in such cQED systems recently and a phase selective coupling leads to strong bunching signatures [44]. Our strong bunching enhancement relies not on the number of emitters, but on the quantum feedback induced intereference effect.…”

Superbunching pseudothermal light

“…Two-photon superbunching is usually introduced by nonlinear interaction between light and atoms [18][19][20][21][22][23][24][25][26], quantum dots [27][28][29], or nonlinear medium [30][31][32][33][34][35], etc.. The efficiency of generating two-photon bunching effect with nonlinear interaction is usually very low and high precision is always required in adjusting the experimental setup [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35].…”

“…The efficiency of generating two-photon bunching effect with nonlinear interaction is usually very low and high precision is always required in adjusting the experimental setup [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Fortunately, nonlinear interaction is not necessary for generating two-photon superbunching.…”

Plasmonic superradiance of two emitters near metal nanorod

“…This result is quite similar with numerical results of. [11], [12] We see from Equation (24) that 0 Sr > , so if (2) 0 ∆ > then the superradiance increases RQE given by Equation (17): as larger as bigger is Sr . One can see from Equation (24) Because of γ depends on the position of emitter near the nanorod, in particular, on the distance between the nanorod and the emitter, one can determine optimal positions of emitters correspondent to the maximum RQE.…”