Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session B12: 2D Materials: Molybedenum Chalcogenides
11:30 AM–2:30 PM,
Monday, March 4, 2024
Room: M100C
Sponsoring
Unit:
FIAP
Chair: Robert Jacobberger, University of Wisconsin - Madison
Abstract: B12.00008 : Achieving near-perfect light absorption in atomically thin transition metal dichalcogenides through band nesting*
12:54 PM–1:06 PM
Presenter:
Dongjea Seo
(University of Minnesota)
Authors:
Dongjea Seo
(University of Minnesota)
Seungjun Lee
(University of Minnesota)
Nezhueyotl Izquierdo
(University of Minnesota)
Sang Hyun Park
(University of Minnesota)
Eng Hock Lee
(University of Minnesota)
Rehan Younas
(University of Notre Dame)
Guanyu Zhou
(University of Notre Dame)
Christopher Hinkle
(University of Notre Dame)
Tony Low
(University of Minnesota)
Steven J Koester
(University of Minnesota)
Here, we describe an approach where band nesting is used to realize near-perfect light absorbers (NPLAs) with only two or three layers without any complex nanostructures. The primary innovation in our design is to stack two layers of MoS2 to minimize interlayer coupling and preserve their individual band nesting characteristics. Two structures are evaluated: (1) twisted bi-layer MoS2 and (2) two MoS2 layers with a buffer layer in between. Combining these structures with a Salisbury screen geometry, we demonstrate NPLAs with absorption of up to 95% at a photon energy of 2.8 eV. Moreover, theoretical studies suggest that absorption can be as high as 99% and that NPLAs can be realized at various wavelengths using different combinations of 2D materials.
*This work was primarily supported by the National Science Foundation (NSF) through the DMREF program under Award No. DMR-1921629 and DMR-1921818, and in part by the NSF under Award No. ECCS-1542202.Portions of this work were conducted in the Minnesota Nano Center, which is supported by the NSF through the National Nanotechnology Coordinated Infrastructure (NNCI) under Award No. ECCS-2025124.
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