Exciton-Enabled Meta-Optics in Two-Dimensional Transition Metal Dichalcogenides

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Exciton-Enabled Meta-Optics in Two-Dimensional Transition Metal Dichalcogenides
Title:
Exciton-Enabled Meta-Optics in Two-Dimensional Transition Metal Dichalcogenides
Other Titles:
Nano Letters
Publication Date:
15 October 2020
Citation:
Wang, Z., Yuan, G., Yang, M., Chai, J., Steve Wu, Q. Y., Wang, T., … Teng, J. (2020). Exciton-Enabled Meta-Optics in Two-Dimensional Transition Metal Dichalcogenides. Nano Letters, 20(11), 7964–7972. doi:10.1021/acs.nanolett.0c02712
Abstract:
Optical wavefront engineering has been rapidly developing in fundamentals from the phase accumulation in optical path to the electromagnetic resonances of confined nano-modes in optical metasurfaces. However, the amplitude modulation of light has limited approaches that usually originate from the ohmic loss and absorptive dissipation of materials. Here, an atomically thin photon-sieve platform made of MoS2 multilayers is demonstrated for highquality optical nano-devices, assisted fundamentally by strong excitonic resonances at the band-nesting region of MoS2. The atomic thin MoS2 significantly facilitates high transmission of the sieved photons and high-fidelity nano-fabrication. A proof-of-concept two-dimensional (2D) nanosieve hologram exhibits tenfold enhanced efficiency compared with its non-2D counterparts. Furthermore, a super-critical 2D lens with its focal spot breaking diffraction limit is developed to exhibit experimentally far-field label-free aberrationless imaging with a resolution of ~0.44λ at λ=450 nm in air. This transition-metaldichalcogenides (TMDCs) photonic platform opens new opportunities towards future 2D meta-optics and nano-photonics
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the A*STAR - 2D Pharos Program
Grant Reference no. : 152700014

This research / project is supported by the A*STAR - 2D Pharos Program
Grant Reference no. : 152700012

This research / project is supported by the MOE - ARF Tier 3 Program
Grant Reference no. : MOE2016-T3-1-006 (S)

This research / project is supported by the A*STAR - SERC PSF
Grant Reference no. : A1685b0005

This research / project is supported by the MOE - ARF Tier 1
Grant Reference no. : 1-RG189/17(S)

This research / project is supported by the USTC - Double First-Class Initiative
Grant Reference no. : YD2030002003

This research / project is supported by the NNSFC - Fundamental Research
Grant Reference no. : 61705085
Description:
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.nanolett.0c02712
ISSN:
1530-6984
1530-6992
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