Year: 2023
Type: preprint
Abstract: Controlling excitons at the nanoscale in semiconductor materials represents a formidable challenge in the fields of quantum photonics and optoelectronics. Achieving this control holds great potential for unlocking strong exciton-exciton interaction regimes, enabling exciton-based logic operations, exploring exotic quantum phases of matter, facilitating deterministic positioning and tuning of quantum emitters, and designing advanced optoelectronic devices. Monolayers of transition metal dichalcogenides (TMDs) offer inherent two-dimensional confinement and possess significant binding energies, making them particularly promising candidates for achieving electric-field-based confinement of excitons without dissociation. While previous exciton engineering strategies have predominantly focused on local strain gradients, the recent emergence of electrically confined states in TMDs has paved the way for novel approaches. Exploiting the valley degree of freedom associated with these confined states further broadens the prospects for exciton engineering. Here, we show electric control of light polarization emitted from one-dimensional (1D) quantum confined states in MoSe2. By employing non-uniform in-plane electric fields, we demonstrate the in-situ tuning of the trapping potential and reveal how gate-tunable valley-hybridization gives rise to linearly polarized emission from these localized states. Remarkably, the polarization of the localized states can be entirely engineered through either the spatial geometry of the 1D confinement potential or the application of an out-of-plane magnetic field.
Source: arXiv (Cornell University)
Authors: Heithoff, Maximilian, Moreno, Álvaro, Torre, Iacopo, Feuer, Matthew S. G., Purser, Carola M., Andolina, Gian Marcello, Calajo, Giuseppe, Watanabe, Kenji, Taniguchi, Takashi, Kara, Dhiren, Hays, Patrick, Tongay, Sefaattin, Falko, Vladimir, Chang, Darrick, Atatüre, Mete, Reserbat-Plantey, Antoine, Koppens, Frank
Institutions: Institute of Photonic Sciences, University of Cambridge, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, National Institute for Materials Science, Arizona State University, Institució Catalana de Recerca i Estudis Avançats, Centre de Recherche sur l'Hétéro-Epitaxie et ses Applications
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, Centres de Recerca de Catalunya, Graphene Flagship, European Commission, Agence Nationale de la Recherche, Ministry of Education, Culture, Sports, Science and Technology, Generalitat de Catalunya, QuantERA, Engineering and Physical Sciences Research Council, Japan Society for the Promotion of Science, Agència de Gestió d'Ajuts Universitaris i de Recerca, Agencia Estatal de Investigación, Division of Materials Research, Division of Civil, Mechanical and Manufacturing Innovation, Division of Electrical, Communications and Cyber Systems, H2020 European Research Council
Awards: G1088600580, G1120750373, G1150230064, G1175115578, G1197496967, G120905174, G1272927172, G1495698476, G1664854973, G1812469767, G1864292752, G1908469581, G2064873908, G2090955015, G210041235, G2114305129, G2115222242, G219572015, G2262748287, G2442584775, G2457300166, G2575991346, G2601397997, Manufacturing of Two-Dimensional Metal-Organic Framework Nanosheets by Two-Phase Solution Method, G2763573136, G288263039, G2988934680, G3005324705, G300979063, G34346518, G3480869486, G357246561, G3681454997, G4042783231, Quantum Nonlinear Optics in Atomic Arrays, G4162329948, Spin-orbitronic devices based on 2D Rashba Janus crystals as active materials, G425668148, G4342609226, G434337789, G4638193739, G4806815962, G5010576039, G5080475149, Graphene Flagship Core Project 3, G531036588, G558466653, G5664895334, Two-dimensional quantum materials and devices for scalable integrated photonic circuits, G5852091828, G5922099756, G6054710752, G6199966231, G6200043914, G6394471472, G6482940084, G6656126374, G69051668, G7084143925, G7185883033, G7425137858, 古代説話における諸寺縁起の研究, G7653886679, G7842812455, 2D quaNtum Emitters Arrays, THE SYNTHESIS 2D JANUS VDW CRYSTALS AND NOVEL QUANTUM PHENOMENA ARISING FROM MIRROR-SYMMETRY BREAKING, G808699454, G8180681537, G8316820965, Bosonic Condensation and Emergent Phenomena in 2D Janus layers and Moiré Lattices, G8684520763, G8800819381, G880779785, GOALI: Large Scale Synthesis and Manufacturing of Atomically Thin Polar Materials for Quantum Applications, G887491987, G898758523, Photon-photon and spin-spin Entanglement using Diamond-based impurity Elements: Silicon, Tin And Lead, G942738674, G975175939
OpenAlex ID: W4388585386