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Interlayer exciton valleytronics in bilayer heterostructures interfaced with a phase gradient metasurface

Sohoni, Mandar and Jha, Pankaj K. and Nalabothula, Muralidhar and Kumar, Anshuman (2020) Interlayer exciton valleytronics in bilayer heterostructures interfaced with a phase gradient metasurface. Applied Physics Letters, 117 (12). Art. No. 121101. ISSN 0003-6951. https://resolver.caltech.edu/CaltechAUTHORS:20200922-125904483

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Abstract

Interlayer excitons in bilayer heterostructures of two-dimensional semiconductors have opened a new platform for valley physics and optoelectronic applications owing to several unique properties. Here, we theoretically demonstrate the coherent manipulation of the interlayer excitonic valley degree of freedom in a transition metal dichalcogenide heterobilayer interfaced with a phase gradient metasurface. We harness the peculiar out-of-plane component of polarization of interlayer excitons in conjunction with the anisotropy of the vacuum of the electromagnetic field enabled by the metasurface to induce coherent coupling between mutually orthogonal interlayer excitonic optical selection rule. This coupling leads to a much larger domain within the valley psuedo-spin Bloch sphere being accessible in these heterostructures. Our proposed route to coherent manipulation of interlayer excitons in bilayer heterostructures with structured interfaces such as a metasurface may pave the way for engineering an array of interacting quantum emitters in Moiré heterostructures for chip-scale quantum information science.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1063/5.0015087DOIArticle
ORCID:
AuthorORCID
Sohoni, Mandar0000-0003-1008-3869
Jha, Pankaj K.0000-0002-5839-3391
Nalabothula, Muralidhar0000-0002-9490-5307
Kumar, Anshuman0000-0002-7433-8341
Alternate Title:Interlayer Exciton Valleytronics in Bilayer Heterostructures Interfaced with a Metasurface
Additional Information:© 2020 Published under license by AIP Publishing. Submitted: 25 May 2020; Accepted: 2 September 2020; Published Online: 21 September 2020. A. Kumar acknowledges funding support from the Department of Science and Technology via Grant Nos. SB/S2/RJN-110/2017, DST/NM/NS-2018/49, and ECR/2018/001485. Data Availability: The data that support the findings of this study are available within the article (and its supplementary material).
Funders:
Funding AgencyGrant Number
Department of Science and Technology (India)SB/S2/RJN-110/2017
Department of Science and Technology (India)DST/NM/NS-2018/49
Department of Science and Technology (India)ECR/2018/001485
Issue or Number:12
Record Number:CaltechAUTHORS:20200922-125904483
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200922-125904483
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105471
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:22 Sep 2020 20:24
Last Modified:22 Sep 2020 20:24

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