Enhanced Photo-excitation and Angular-Momentum Imprint of Gray Excitons in WSe

Oscar Javier Gomez Sanchez, Guan-Hao Peng, Wei-Hua Li, Ching-Hung Shih, Chao-Hsin Chien, Shun-Jen Cheng

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Article in ACS nano, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

6 authors.

Oscar Javier Gomez SanchezDepartment of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan.ORCID 0000-0002-7463-1353

Guan-Hao PengDepartment of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan.

Wei-Hua LiDepartment of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan.

Ching-Hung ShihInstitute of Electronics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan.

Chao-Hsin ChienInstitute of Electronics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan.

Shun-Jen ChengDepartment of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan.ORCID 0000-0002-1721-7914

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A light beam can be spatially structured in the complex amplitude to possess orbital angular momentum (OAM), which introduces an extra degree of freedom alongside the intrinsic spin angular momentum (SAM) associated with circular polarization. Furthermore, superimposing two such twisted light (TL) beams with distinct SAM and OAM produces a vector vortex beam (VVB) in nonseparable states where not only complex amplitude but also polarization is spatially structured and entangled with each other. In addition to the nonseparability, the SAM and OAM in a VVB are intrinsically coupled by the optical spin-orbit interaction and constitute the profound spin-orbit physics in photonics. In this work, we present a comprehensive theoretical investigation, implemented on the first-principles base, of the intriguing light-matter interaction between VVBs and WSe

Indexed as

gray excitontransition-metal dichalcogenidetwisted lighttwo-dimensional materialsvector vortex beamWSe2

Identifiers

PMID38637308

DOI10.1021/acsnano.4c01881

PMCPMC11064230

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.