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Title: Enhanced Absorption in 2D Materials Via Fano- Resonant Photonic Crystals

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4919760· OSTI ID:1185833
 [1];  [1];  [1];  [1];  [2];  [2];  [1];  [1]
  1. Vanderbilt Univ., Nashville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The use of two-dimensional (2D) materials in optoelectronics has attracted much attention due to their fascinating optical and electrical properties. For instance, graphenebased devices have been employed for applications such as ultrafast and broadband photodetectors and modulators while transition metal dichalcogenide (TMDC) based photodetectors can be used for ultrasensitive photodetection. However, the low optical absorption of 2D materials arising from their atomic thickness limits the maximum attainable external quantum efficiency. For example, in the visible and NIR regimes monolayer MoS2 and graphene absorb only ~10% and 2.3% of incoming light, respectively. Here, we experimentally demonstrate the use of Fano-resonant photonic crystals to significantly boost absorption in atomically thin materials. Using graphene as a test bed, we demonstrate that absorption in the monolayer thick material can be enhanced to 77% within the telecommunications band, the highest value reported to date. We also show that the absorption in the Fano-resonant structure is non-local, with light propagating up to 16 μm within the structure. This property is particularly beneficial in harvesting light from large areas in field-effect-transistor based graphene photodetectors in which separation of photo-generated carriers only occurs ~0.2 μm adjacent to the graphene/electrode interface.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1185833
Journal Information:
Applied Physics Letters, Vol. 106, Issue 18; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 83 works
Citation information provided by
Web of Science

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Cited By (21)

Engineering Optical Absorption in Graphene and Other 2D Materials: Advances and Applications journal July 2019
Recent Advances in Resonant Waveguide Gratings journal July 2018
Rolling up MoSe 2 Nanomembranes as a Sensitive Tubular Photodetector journal August 2019
High-sensitivity refractive index sensors based on Fano resonance in the plasmonic system of splitting ring cavity-coupled MIM waveguide with tooth cavity journal December 2018
Perfect near-infrared absorption of graphene with hybrid dielectric nanostructures journal November 2019
Strong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators journal February 2017
Deep and fast free-space electro-absorption modulation in a mobility-independent graphene-loaded Bragg resonator journal July 2018
Ultra-narrowband absorption enhancement in monolayer transition-metal dichalcogenides with simple guided-mode resonance filters journal June 2019
Magnetic polariton enhanced broadband absorption and photoresponse of monolayer MoS 2 based on normal and anomalous metallic gratings journal June 2018
New highly efficient 2D SiC UV-absorbing material with plasmonic light trapping journal October 2019
Angle-Insensitive Broadband Absorption Enhancement of Graphene Using a Multi-Grooved Metasurface journal March 2019
Graphene patterns supported terahertz tunable plasmon induced transparency journal January 2018
Near-infrared absorption-induced switching effect via guided mode resonances in a graphene-based metamaterial journal January 2019
Dual-band tunable narrowband near-infrared light trapping control based on a hybrid grating-based Fabry–Perot structure journal January 2020
Tunable high-efficiency light absorption of monolayer graphene via Tamm plasmon polaritons journal January 2016
Enhanced absorption in a graphene embedded 1D guided-mode-resonance structure without back-reflector and interferometrically written gratings journal January 2019
Hybrid metasurface for broadband enhancing optical absorption and Raman spectroscopy of graphene journal January 2017
Van der Waals materials integrated nanophotonic devices [Invited] journal January 2019
A Narrow Dual-Band Monolayer Unpatterned Graphene-Based Perfect Absorber with Critical Coupling in the Near Infrared journal January 2020
A proposal of a perfect graphene absorber with enhanced design and fabrication tolerance journal July 2017
Graphene-Based Perfect Absorption Structures in the Visible to Terahertz Band and Their Optoelectronics Applications journal December 2018

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