Near-Unity Absorption in van der Waals Semiconductors for Ultrathin Optoelectronics

Jariwala, Deep; Davoyan, Artur R.; Tagliabue, Giulia; Sherrott, Michelle C.; Wong, Joeson; Atwater, Harry A.

doi:10.1021/acs.nanolett.6b01914

Near-Unity Absorption in van der Waals Semiconductors for Ultrathin Optoelectronics

Journal Article · Fri Aug 26 00:00:00 EDT 2016 · Nano Letters

DOI:https://doi.org/10.1021/acs.nanolett.6b01914· OSTI ID:1388841

Jariwala, Deep ^[1]; Davoyan, Artur R. ^[1]; Tagliabue, Giulia ^[1]; Sherrott, Michelle C. ^[1]; Wong, Joeson ^[1]; Atwater, Harry A. ^[1]

California Inst. of Technology (CalTech), Pasadena, CA (United States)

In this work we demonstrate near-unity, broadband absorbing optoelectronic devices using sub-15 nm thick transition metal dichalcogenides (TMDCs) of molybdenum and tungsten as van der Waals semiconductor active layers. Specifically, we report that near-unity light absorption is possible in extremely thin (<15 nm) van der Waals semiconductor structures by coupling to strongly damped optical modes of semiconductor/metal heterostructures. We further fabricate Schottky junction devices using these highly absorbing heterostructures and characterize their optoelectronic performance. Our work addresses one of the key criteria to enable TMDCs as potential candidates to achieve high optoelectronic efficiency.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI)

Sponsoring Organization:: National Science Foundation (NSF); Swiss National Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0001293

OSTI ID:: 1388841

Journal Information:: Nano Letters, Journal Name: Nano Letters Journal Issue: 9 Vol. 16; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Near-Unity Absorption in van der Waals Semiconductors for Ultrathin Optoelectronics

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