Work

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

Year: 2024

Type: article

Abstract: 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.

Source: Photonics

DOI: 10.3390/photonics11100917

Authors: Huan Jiang, Junhao Huang, Wenchang Zhu, Yetian Wang, Alexander V. Kildishev

Institutions: Guangdong University of Technology, Purdue University West Lafayette

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,728

Funders: National Natural Science Foundation of China, Basic and Applied Basic Research Foundation of Guangdong Province