Bright and Dark Exciton Coherent Coupling and Hybridization Enabled by External Magnetic Fields.
Sign Up to like & getrecommendations! Published in 2022 at "Nano letters"
DOI: 10.1021/acs.nanolett.1c04667
Abstract: Magnetic field- and polarization-dependent measurements on bright and dark excitons in monolayer WSe2 combined with time-dependent density functional theory calculations reveal intriguing phenomena. Magnetic fields up to 25 T parallel to the WSe2 plane lead… read more here.
Keywords: hybridization; bright dark; coherent; magnetic fields ... See more keywords
Tip-Enhanced Dark Exciton Nanoimaging and Local Strain Control in Monolayer WSe2.
Sign Up to like & getrecommendations! Published in 2022 at "Nano letters"
DOI: 10.1021/acs.nanolett.2c03959
Abstract: Dark excitons in transition-metal dichalcogenides, with their long lifetimes and strong binding energies, provide potential platforms from photonic and optoelectronic applications to quantum information science even at room temperature. However, their spatial heterogeneity and sensitivity… read more here.
Keywords: exciton; control; emission; strain ... See more keywords
Near-Field Coupling with a Nanoimprinted Probe for Dark Exciton Nanoimaging in Monolayer WSe2.
Sign Up to like & getrecommendations! Published in 2023 at "Nano letters"
DOI: 10.1021/acs.nanolett.3c00621
Abstract: Tip-enhanced photoluminescence (TRPL) is a powerful technique for spatially and spectrally probing local optical properties of 2-dimensional (2D) materials that are modulated by the local heterogeneities, revealing inaccessible dark states due to bright state overlap… read more here.
Keywords: near field; probe; field; dark exciton ... See more keywords
Emerging photoluminescence from the dark-exciton phonon replica in monolayer WSe2
Sign Up to like & getrecommendations! Published in 2019 at "Nature Communications"
DOI: 10.1038/s41467-019-10477-6
Abstract: Tungsten-based monolayer transition metal dichalcogenides host a long-lived “dark” exciton, an electron-hole pair in a spin-triplet configuration. The long lifetime and unique spin properties of the dark exciton provide exciting opportunities to explore light-matter interactions… read more here.
Keywords: exciton; phonon; photoluminescence dark; replica monolayer ... See more keywords
Dark-exciton valley dynamics in transition metal dichalcogenide alloy monolayers
Sign Up to like & getrecommendations! Published in 2019 at "Scientific Reports"
DOI: 10.1038/s41598-019-40932-9
Abstract: We report a comprehensive theory to describe exciton and biexciton valley dynamics in monolayer Mo1−xWxSe2 alloys. To probe the impact of different excitonic channels, including bright and dark excitons, intravalley biexcitons, intervalley scattering between bright… read more here.
Keywords: alloy; temperature; valley dynamics; exciton valley ... See more keywords
Bright excitonic multiplexing mediated by dark exciton transition in two-dimensional TMDCs at room temperature.
Sign Up to like & getrecommendations! Published in 2022 at "Materials horizons"
DOI: 10.1039/d1mh01186c
Abstract: 2D-semiconductors with strong light-matter interaction are attractive materials for integrated and tunable optical devices. Here, we demonstrate room-temperature wavelength multiplexing of the two-primary bright excitonic channels (Ab-, Bb-) in monolayer transition metal dichalcogenides (TMDs) arising… read more here.
Keywords: room temperature; temperature; bright excitonic; transition ... See more keywords
Optical control of a dark exciton reservoir
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.104.035414
Abstract: Optically inactive or dark excitons play an important role in exciton and polariton devices. On one hand, they supply excitons to the light cone and feed the photoluminescence signal. On the other hand, they repel… read more here.
Keywords: optical control; spectroscopy; exciton reservoir; exciton ... See more keywords
Phonon-assisted dark exciton preparation in a quantum dot
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.95.195305
Abstract: In semiconductor quantum dots the coupling to the environment, i.e. to phonons, plays a crucial role for optical state preparation. We analyze the phonon impact on two methods for a direct optical preparation of the… read more here.
Keywords: quantum; assisted dark; exciton preparation; phonon assisted ... See more keywords