HEИндивидуална стипендия2022–2025

INTRINSIC · INducing TRionic gaIn in two-dimensional semicoNductors by local StraIn and Charge manipulation

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

Период: 2022-11-01 → 2025-10-31
Финансиране от ЕС: 265 099 €
Участници: 3
Схема: HORIZON-TMA-MSCA-PF-GF

Линиите свързват координатора с партньорите.

Накратко на български

Двуизмерните полупроводници се изследват чрез контролиране на частици, наречени екзитони и триони, чрез промяна на тяхната форма и заряд. Това помага за създаването на по-ефективни оптоелектронни устройства и нови механизми за работа на лазерите.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

INducing TRionic gaIn in two-dimensional semicoNductors by local StraIn and Charge manipulation

The INTRINSIC project (INducing TRionic gaIn in two-dimensional semicoNductors by local StraIn and Charge manipulation) aims to advance excitonic-based optoelectronic devices by controlling excitonic complexes, such as excitons and trions, in 2D semiconductors, particularly transition metal dichalcogenides (TMDCs). The project seeks to achieve precise exciton-to-trion conversion, enabling trionic optical gain and lasing — a mechanism relying on intrinsic exciton-trion interactions upon photoexcitation rather than global population inversion. To accomplish this, INTRINSIC investigates how excitonic complexes form in TMDCs under morphological and dielectric changes. It focuses as well on designing open optical cavities that can induce both (i) charge confinement effects through strain or charge doping, promoting exciton-to-trion conversion and (ii) laser feedback in targeted spectral regions.

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

Цел на проекта

The ability to manipulate excitonic complexes in 2D-materials is of fundamental importance for the development of excitonic based optoelectronic devices operating in low-carrier density, low-power regimes. Correlating locally variable quantities with emission properties of excitonic complexes on sub-diffraction length scale could enable on-demand control of the mutual conversion between excitons and trions. In particular, control over trion density upon photoexcitation in a functionalized 2D-material disclose the possibility to achieve trionic optical gain, that is, a condition of optical gain sustained by the difference between trion and pre-doped electron density. As a peculiarity, trionic optical gain does not require global population inversion common to optical gain mechanisms of conventional semiconductors. Therefore, trion density control could enable optical amplification and lasing at unprecedented low levels of excitation. To this end, we aim to understand the photoexcitation dependent trion formation process, their abundance and stability upon variation of local quantities such as carrier doping, defects density and strain fields in 2D-materials. To pursue this goal we will implement a structural /spectroscopic correlated approach based on hyperspectral nano-imaging and far-field cryo-microscopy of 2D monolayers transferred on a plasmonic nanopillars array with controlled levels of charge doping and strain. Demonstration of trionic optical gain in such conditions will provide the necessary requirement for achieving trionic lasing. Laser feedback will be then realized by engineering the surface lattice resonance of a plasmonic nanopillar cavity to match the trionic peak gain wavelength.

Оригинален текст от CORDIS (на английски).

Участници

POLITECNICO DI TORINO · TorinoКоординаторИталия
FONDAZIONE ISTITUTO ITALIANO DI TECNOLOGIA · GenovaИталия
TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK · New YorkСъединени щати