Radially polarized light beams from spin-forbidden dark excitons and trions in monolayer WSe$_2$

Autor:	Borghardt, Sven, Sonntag, Jens, Tu, Jhih-Sian, Taniguchi, Takashi, Watanabe, Kenji, Beschoten, Bernd, Stampfer, Christoph, Kardynal, Beata Ewa
Rok vydání:	2020
Předmět:	Physics - Optics Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Opt. Mater. Express 10, 1273-1285 (2020)
Druh dokumentu:	Working Paper
DOI:	10.1364/OME.388913
Popis:	The rich optical properties of transition metal dichalcogenide monolayers (TMD-MLs) render these materials promising candidates for the design of new optoelectronic devices. Despite the large number of excitonic complexes in TMD-MLs, the main focus has been put on optically bright neutral excitons. Spin-forbidden dark excitonic complexes have been addressed for basic science purposes, but not for applications. We report on spin-forbidden dark excitonic complexes in ML WSe$_2$ as an ideal system for the facile generation of radially polarized light beams. Furthermore, the spatially resolved polarization of photoluminescence beams can be exploited for basic research on excitons in two-dimensional materials. Comment: 13 pages, 7 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2001.08043 Zobrazit plný text záznamu View this record from Arxiv