Probing dark exciton navigation through a local strain landscape in a WSe2 monolayer

Gelly, Ryan J.; Renaud, Dylan; Liao, Xing; Pingault, Benjamin; Bogdanovic, Stefan; Scuri, Giovanni; Watanabe, Kenji; Taniguchi, Takashi; Urbaszek, Bernhard; Park, Hongkun; Lončar, Marko

doi:10.1038/s41467-021-27877-2

Title: Probing dark exciton navigation through a local strain landscape in a WSe2 monolayer

Journal Article · 10 January 2022 · Nature Communications

DOI: https://doi.org/10.1038/s41467-021-27877-2 · OSTI ID:1839321

Gelly, Ryan J.; Renaud, Dylan; Liao, Xing; Pingault, Benjamin; Bogdanovic, Stefan;

;

; Park, Hongkun;

Abstract In WSe ₂ monolayers, strain has been used to control the energy of excitons, induce funneling, and realize single-photon sources. Here, we developed a technique for probing the dynamics of free excitons in nanoscale strain landscapes in such monolayers. A nanosculpted tapered optical fiber is used to simultaneously generate strain and probe the near-field optical response of WSe ₂ monolayers at 5 K. When the monolayer is pushed by the fiber, its lowest energy states shift by as much as 390 meV (>20% of the bandgap of a WSe ₂ monolayer). Polarization and lifetime measurements of these red-shifting peaks indicate they originate from dark excitons. We conclude free dark excitons are funneled to high-strain regions during their long lifetime and are the principal participants in drift and diffusion at cryogenic temperatures. This insight supports proposals on the origin of single-photon sources in WSe ₂ and demonstrates a route towards exciton traps for exciton condensation.

View Journal Article

Cite

Export

Save

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0020115

OSTI ID:: 1839321

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 13; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

References (35)

Dynamic Exciton Funneling by Local Strain Control in a Monolayer Semiconductor Moon, Hyowon; Grosso, Gabriele; Chakraborty, Chitraleema Nano Letters, Vol. 20, Issue 9 https://doi.org/10.1021/acs.nanolett.0c02757	journal	August 2020
Strain-Induced Spatial and Spectral Isolation of Quantum Emitters in Mono- and Bilayer WSe ₂ Kumar, S.; Kaczmarczyk, A.; Gerardot, B. D. Nano Letters, Vol. 15, Issue 11 https://doi.org/10.1021/acs.nanolett.5b03312	journal	October 2015
Band Gap Engineering with Ultralarge Biaxial Strains in Suspended Monolayer MoS ₂ Lloyd, David; Liu, Xinghui; Christopher, Jason W. Nano Letters, Vol. 16, Issue 9 https://doi.org/10.1021/acs.nanolett.6b02615	journal	August 2016
Mechanistic Origin of the Ultrastrong Adhesion between Graphene and a -SiO ₂ : Beyond van der Waals Kumar, Sandeep; Parks, David; Kamrin, Ken ACS Nano, Vol. 10, Issue 7 https://doi.org/10.1021/acsnano.6b00382	journal	July 2016
Quantum Calligraphy: Writing Single-Photon Emitters in a Two-Dimensional Materials Platform Rosenberger, Matthew R.; Dass, Chandriker Kavir; Chuang, Hsun-Jen ACS Nano, Vol. 13, Issue 1 https://doi.org/10.1021/acsnano.8b08730	journal	December 2018
Strain-Correlated Localized Exciton Energy in Atomically Thin Semiconductors Moon, Hyowon; Bersin, Eric; Chakraborty, Chitraleema ACS Photonics, Vol. 7, Issue 5 https://doi.org/10.1021/acsphotonics.0c00626	journal	April 2020
Strain-Induced Indirect to Direct Bandgap Transition in Multilayer WSe ₂ Desai, Sujay B.; Seol, Gyungseon; Kang, Jeong Seuk Nano Letters, Vol. 14, Issue 8 https://doi.org/10.1021/nl501638a	journal	July 2014
Spontaneous coherence in a cold exciton gas High, A. A.; Leonard, J. R.; Hammack, A. T. Nature, Vol. 483, Issue 7391 https://doi.org/10.1038/nature10903	journal	March 2012
Deterministic strain-induced arrays of quantum emitters in a two-dimensional semiconductor Branny, Artur; Kumar, Santosh; Proux, Raphaël Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/ncomms15053	journal	May 2017
Large-scale quantum-emitter arrays in atomically thin semiconductors Palacios-Berraquero, Carmen; Kara, Dhiren M.; Montblanch, Alejandro R. -P. Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/ncomms15093	journal	May 2017
Mechanical properties of atomically thin boron nitride and the role of interlayer interactions Falin, Aleksey; Cai, Qiran; Santos, Elton J. G. Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/ncomms15815	journal	June 2017
High-temperature superfluidity with indirect excitons in van der Waals heterostructures Fogler, M. M.; Butov, L. V.; Novoselov, K. S. Nature Communications, Vol. 5, Issue 1 https://doi.org/10.1038/ncomms5555	journal	July 2014
Magnetic brightening and control of dark excitons in monolayer WSe2 Zhang, Xiao-Xiao; Cao, Ting; Lu, Zhengguang Nature Nanotechnology, Vol. 12, Issue 9 https://doi.org/10.1038/nnano.2017.105	journal	June 2017
Probing dark excitons in atomically thin semiconductors via near-field coupling to surface plasmon polaritons Zhou, You; Scuri, Giovanni; Wild, Dominik S. Nature Nanotechnology, Vol. 12, Issue 9 https://doi.org/10.1038/nnano.2017.106	journal	June 2017
Emerging photoluminescence from the dark-exciton phonon replica in monolayer WSe2 Li, Zhipeng; Wang, Tianmeng; Jin, Chenhao Nature Communications, Vol. 10, Issue 1 https://doi.org/10.1038/s41467-019-10477-6	journal	June 2019
Dynamics and efficient conversion of excitons to trions in non-uniformly strained monolayer WS2 Harats, Moshe G.; Kirchhof, Jan N.; Qiao, Mengxiong Nature Photonics, Vol. 14, Issue 5 https://doi.org/10.1038/s41566-019-0581-5	journal	February 2020
Exciton diffusion in WSe ₂ monolayers embedded in a van der Waals heterostructure Cadiz, F.; Robert, C.; Courtade, E. Applied Physics Letters, Vol. 112, Issue 15 https://doi.org/10.1063/1.5026478	journal	April 2018
Exciton transport in strained monolayer WSe ₂ Cordovilla Leon, Darwin F.; Li, Zidong; Jang, Sung Woon Applied Physics Letters, Vol. 113, Issue 25 https://doi.org/10.1063/1.5063263	journal	December 2018
Locally defined quantum emission from epitaxial few-layer tungsten diselenide Wu, Wei; Dass, Chandriker K.; Hendrickson, Joshua R. Applied Physics Letters, Vol. 114, Issue 21 https://doi.org/10.1063/1.5091779	journal	May 2019
Magnetic field mixing and splitting of bright and dark excitons in monolayer MoSe ₂ Lu, Zhengguang; Rhodes, Daniel; Li, Zhipeng 2D Materials, Vol. 7, Issue 1 https://doi.org/10.1088/2053-1583/ab5614	journal	November 2019
Fiber-Coupled Diamond Quantum Nanophotonic Interface Burek, Michael J.; Meuwly, Charles; Evans, Ruffin E. Physical Review Applied, Vol. 8, Issue 2 https://doi.org/10.1103/PhysRevApplied.8.024026	journal	August 2017
Valley dynamics probed through charged and neutral exciton emission in monolayer WSe 2 Wang, G.; Bouet, L.; Lagarde, D. Physical Review B, Vol. 90, Issue 7 https://doi.org/10.1103/PhysRevB.90.075413	journal	August 2014
Fine structure and lifetime of dark excitons in transition metal dichalcogenide monolayers Robert, C.; Amand, T.; Cadiz, F. Physical Review B, Vol. 96, Issue 15 https://doi.org/10.1103/PhysRevB.96.155423	journal	October 2017
Theory of strain-induced confinement in transition metal dichalcogenide monolayers Brooks, Matthew; Burkard, Guido Physical Review B, Vol. 97, Issue 19 https://doi.org/10.1103/PhysRevB.97.195454	journal	May 2018
Strain tuning of excitons in monolayer WSe 2 Aslan, Ozgur Burak; Deng, Minda; Heinz, Tony F. Physical Review B, Vol. 98, Issue 11 https://doi.org/10.1103/PhysRevB.98.115308	journal	September 2018
Tightly Bound Excitons in Monolayer WSe 2 He, Keliang; Kumar, Nardeep; Zhao, Liang Physical Review Letters, Vol. 113, Issue 2 https://doi.org/10.1103/PhysRevLett.113.026803	journal	July 2014
Generation and Evolution of Spin-, Valley-, and Layer-Polarized Excited Carriers in Inversion-Symmetric WSe 2 Bertoni, R.; Nicholson, C. W.; Waldecker, L. Physical Review Letters, Vol. 117, Issue 27 https://doi.org/10.1103/PhysRevLett.117.277201	journal	December 2016
In-Plane Propagation of Light in Transition Metal Dichalcogenide Monolayers: Optical Selection Rules Wang, G.; Robert, C.; Glazov, M. M. Physical Review Letters, Vol. 119, Issue 4 https://doi.org/10.1103/PhysRevLett.119.047401	journal	July 2017
Large Excitonic Reflectivity of Monolayer MoSe 2 Encapsulated in Hexagonal Boron Nitride Scuri, Giovanni; Zhou, You; High, Alexander A. Physical Review Letters, Vol. 120, Issue 3 https://doi.org/10.1103/PhysRevLett.120.037402	journal	January 2018
Magnetooptics of Exciton Rydberg States in a Monolayer Semiconductor Stier, A. V.; Wilson, N. P.; Velizhanin, K. A. Physical Review Letters, Vol. 120, Issue 5 https://doi.org/10.1103/PhysRevLett.120.057405	journal	February 2018
Gate Tunable Dark Trions in Monolayer WSe 2 Liu, Erfu; van Baren, Jeremiah; Lu, Zhengguang Physical Review Letters, Vol. 123, Issue 2 https://doi.org/10.1103/PhysRevLett.123.027401	journal	July 2019
Localized Intervalley Defect Excitons as Single-Photon Emitters in WSe 2 Linhart, Lukas; Paur, Matthias; Smejkal, Valerie Physical Review Letters, Vol. 123, Issue 14 https://doi.org/10.1103/PhysRevLett.123.146401	journal	September 2019
Valley-selective chiral phonon replicas of dark excitons and trions in monolayer WS e 2 Liu, Erfu; van Baren, Jeremiah; Taniguchi, Takashi Physical Review Research, Vol. 1, Issue 3 https://doi.org/10.1103/PhysRevResearch.1.032007	journal	October 2019
Excitonic Linewidth Approaching the Homogeneous Limit in MoS 2 -Based van der Waals Heterostructures Cadiz, F.; Courtade, E.; Robert, C. Physical Review X, Vol. 7, Issue 2 https://doi.org/10.1103/PhysRevX.7.021026	journal	May 2017
Strain-dependent luminescence and piezoelectricity in monolayer transition metal dichalcogenides De Palma, Alex C.; Cossio, Gabriel; Jones, Kayleigh Journal of Vacuum Science & Technology B, Vol. 38, Issue 4 https://doi.org/10.1116/6.0000251	journal	July 2020

Similar Records

Spin/valley pumping of resident electrons in WSe2 and WS2 monolayers

Journal Article · 2021 · Nature Communications · OSTI ID:1820214

Robert, Cedric; Park, Sangjun; Cadiz, Fabian; +14 more

Chemomechanical modification of quantum emission in monolayer WSe2

Journal Article · 2023 · Nature Communications · OSTI ID:2325125

Utama, M. Iqbal Bakti; Zeng, Hongfei; Sadhukhan, Tumpa; +14 more

Gate Tunable Dark Trions in Monolayer WSe₂

Journal Article · 2019 · Physical Review Letters · OSTI ID:1609905

Liu, Erfu; van Baren, Jeremiah; Lu, Zhengguang; +5 more

Title: Probing dark exciton navigation through a local strain landscape in a WSe2 monolayer

Citation Formats

References (35)

Similar Records

Related Subjects