Photovoltaic Probe of Cavity Polaritons in a Quantum Cascade Structure

基于极化激元级联的半导体光子对源

A semiconductor photon-pair source based on a polariton cascade

本研究提出一种基于砷化镓量子点与金属纳米颗粒耦合的极化激元级联光子对源，通过永久偶极子打破对称性实现双光子发射，并计算了发射概率与关联特性。

Electrically injected cavity polaritons

We have realised a semiconductor quantum structure that produces electroluminescence while operating in the light-matter strong coupling regime. The mid-infrared light emitting device is composed of a quantum cascade structure embedded in a planar microcavity, based on the GaAs/AlGaAs material system. At zero bias, the structure is characterised using reflectivity measurements which show, up to room temperature, a wide polariton anticrossing between an intersubband transition and the resonant cavity photon mode. Under electrical injection the spectral features of the emitted light change drast…

利用量子级联关联光谱探测多体关联

Probing many-body correlations using quantum-cascade correlation spectroscopy

该研究利用激子极化激元在单跃迁不可分辨区间实现量子级联发射探测，结合光谱滤波与关联光谱观测到关联特性随极化激元能量及两体、三体Feshbach共振的变化，确立了该技术用于半导体量子特性及多体现象研究的价值。

腔耦合Jahn-Teller活性分子中的集体振动电子级联

Collective Vibronic Cascade in Cavity-Coupled Jahn-Teller Active Molecules

本研究探究多个Jahn-Teller活性分子与法布里-珀罗腔模式耦合的极化激元态及动力学，发现集体效应改变角动量相互作用，使分子在单腔光子下实现高角动量振动电子态级联，为腔辅助光物理/化学提供新途径。

Polariton-assisted Singlet Fission in Acene Aggregates

Singlet fission is an important candidate to increase energy conversion efficiency in organic photovoltaics by providing a pathway to increase the quantum yield of excitons per photon absorbed in select materials. We investigate the dependence of exciton quantum yield for acenes in the strong light-matter interaction (polariton) regime, where the materials are embedded in optical microcavities. Starting from an open-quantum-systems approach, we build a kinetic model for time-evolution of species of interest in the presence of quenchers and show that polaritons can decrease or increase exciton …

Quantum optics of nonlinear systems in cascade

In this letter, we investigate the quantum optical properties of driven-dissipative nonlinear systems in a cascade configuration. We show that pumping a nonlinear system with a state having a noncoherent statistics, can improve the antibunching of the output state and, consequently, the nonclassicality of the whole system. Furthermore, we show that is possible to generate entanglement through dissipative coupling. These results applies to a broad category of physical systems with a Kerr-like non-linearity, from Rydberg atoms to exciton polaritons in microcavities.