Tunable Polarization-Selective Absorption by Gating Ultrathin TiN Films in the Near-Infrared Region

Ultrathin titanium nitride (TiN) is a novel material platform for constructing active metasurfaces in the near-infrared region (NIR). Here, we realized tunable polarization-selective absorption by gating ultrathin TiN in an Ultrathin TiN Grating Metasurface (UTGM) and a gold resonator/TiN film Hybri...

Full description

Saved in:
Bibliographic Details
Published in:Photonics 2024-10, Vol.11 (10), p.917
Main Authors: Jiang, Huan, Huang, Junhao, Zhu, Wenchang, Wang, Yetian, V. Kildishev, Alexander
Format: Article
Language:English
Subjects:
Absorption
active metasurfaces
Carrier density
Dichroism
Electric fields
Gating
Gold
I.R. radiation
Linear dichroism
Metasurfaces
Near infrared radiation
Nitrides
Polarization
polarization-selective absorption
the near-infrared region
Tin
Titanium nitride
ultrathin TiN films
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ultrathin titanium nitride (TiN) is a novel material platform for constructing active metasurfaces in the near-infrared region (NIR). Here, we realized tunable polarization-selective absorption by gating ultrathin TiN in an Ultrathin TiN Grating Metasurface (UTGM) and a gold resonator/TiN film Hybrid Metasurface (GTHM), respectively. The TM wave absorption (0.96) was much larger than that of the TE wave in the UTGM. When the carrier density decreased by 12%, the near-perfect TM absorption peak blue-shifted by 0.3 μm. Similarly, the linear dichroism (0.96) peak in GTHM blue-shifted by 0.12 μm when gating ultrathin TiN film. Active metasurfaces with tunable polarization-selective absorption have huge potential in dynamic integrated electro-optic devices in NIR.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics11100917