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