Photoelastic plasmonic metasurfaces with ultra-large near infrared spectral tuning
Liu, Jianxun; Zeng, Hao; Cheng, Ming; Wang, Zhenming; Wang, Jiawei; Cen, Mengjia; Luo, Dan; Priimagi, Arri; Liu, Yan Jun (2022)
Liu, Jianxun
Zeng, Hao
Cheng, Ming
Wang, Zhenming
Wang, Jiawei
Cen, Mengjia
Luo, Dan
Priimagi, Arri
Liu, Yan Jun
2022
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202201241561
https://urn.fi/URN:NBN:fi:tuni-202201241561
Kuvaus
Peer reviewed
Tiivistelmä
Metasurfaces, consisting of artificially fabricated sub-wavelength meta-atoms with pre-designable electromagnetic properties, provide novel opportunities to a variety of applications such as light detectors/sensors, local field imaging and optical displays. Currently, the tuning of most metasurfaces requires redesigning and reproducing the entire structure, rendering them ineligible for post-fabrication shape-morphing or spectral reconfigurability. Here, we report a photoelastic metasurface with an all-optical and reversible resonance tuning in the near infrared range. The photoelastic metasurface consists of hexagonal gold nanoarrays deposited on a deformable substrate made of a liquid crystalline network. Upon photo-actuation, the substrate deforms, causing the lattice to change and, as a result, the plasmon resonance to shift. The centre wavelength of the plasmon resonance exhibits an ultra-large spectral tuning of over 245 nm, from 1490 to 1245 nm, while the anisotropic deformability also endows light-switchable sensitivity in probing polarization. The proposed concept establishes a light-controlled soft platform that is of great potential for tunable/reconfigurable photonic devices, such as nano-filters, -couplers, -holograms, and displays with structural colors.
Kokoelmat
- TUNICRIS-julkaisut [16740]