H2020Индивидуална стипендия2015–2017

PINQUAR · Polaritons IN the QUAntum Regime (PINQUAR)

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2015-05-01 → 2017-04-30
Финансиране от ЕС: 185 076 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Полупроводникови микроструктури се изследват за постигане на силни нелинейни ефекти, като например състояние на тристабилност при въздействие с лазер. Това помага за разработването на нови оптични памети и квантови технологии за излъчване на светлина с некласически свойства.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Polaritons IN the QUAntum Regime (PINQUAR)

Semiconductor microstructures with nonlinear optical response can be used as building-blocks for memories, switches, and other optical devices. For quantum optical technologies, it is important to further enhance and understand the nonlinear response of these microstructures. Thus, the objective of this action was to investigate highly nonlinear and quantum effects in semiconductor microstructures. To this end, the high quality semiconductor cavities developed at the host institution (Center for Nanosciences and Nanotechnologies (C2N), CNRS) where instrumental. The first part of the action was dedicated to study of highly nonlinear effects in coupled microcavities. In particular, we observed tristability, i.e. the existence of three steady states at a given driving condition, for the first time. Which one of those states the cavities adopted depended on the history of the system, i.e. in which direction we scanned the laser power driving the microcavities. The newly found tristability effect can form the basis of future optical memories. In the second part of the project, the influence of quantum fluctuations on the nonlinear response of single semiconductor cavities was observed for the first time. These experiments demonstrated signatures of a novel kind of phase transition of light, known as a dissipative phase transition. The results of this project bring semiconductor cavities a step closer to the long-sought quantum regime, where microcavities can emit light with non-classical properties suitable for novel quantum technologies.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Semiconductor optical microcavities host hybrid light-matter quasi-particles known as polaritons, formed by strong coupling between cavity photons and quantum well excitons. Polaritons are interacting bosons, which above a critical density may condense into a single quantum state. Polariton condensates have enabled fascinating discoveries, yet state of the art experiments remain within the mean-field limit. This means that the physics is governed by a large number of polaritons per mode. We propose to develop polariton systems operating in the quantum regime, where the physics is governed by single or few polaritons. Enhancing the polariton non-linearity is a pre-requisite for accessing the quantum regime. Therefore, our proposal begins with studies of extreme non-linear optical phenomena still within the mean-field limit. In particular, we will study bifurcations, exceptional points, and spin-squeezing. Next, we will enter the quantum regime by exploiting interference effects between coupled polariton modes to generate non-classical light via an effect known as unconventional photon blockade. Our final objective is to demonstrate the conventional photon blockade, wherein a single photon in a highly nonlinear cavity blocks the entrance of a second one. Polaritons IN the QUAntum Regime (PINQUAR) will enable previously inaccessible fundamental studies and applications where photons can be emitted one-by-one, non-classical photon statistics can be engineered in time and energy, and quantum simulations can be performed in a controlled solid-state platform suitable for all-optical integrated circuits.

Оригинален текст от CORDIS (на английски).

Участници

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS · ParisКоординаторФранция