Wavelength-dependent anisotropic light-matter interaction in 2D ferroelectric In2Se3
| Autor: | Jangra, Divya, De, Binoy Krishna, Sharma, Pragati, Chakraborty, Koushik, Parate, Shubham, Yogi, Arvind Kumar, Mittal, Ranjan, Gupta, Mayanak K, Nukala, Pavan, Velpula, Praveen Kumar, Sathe, Vasant G. |
|---|---|
| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The anisotropic light-matter interactions in 2D materials have garnered significant attention for their potential to develop futuristic polarization-based optoelectronic devices, such as photodetectors and photo-actuators. In this study, we investigate the polarization-dependent interactions in ferroelectric 3R alpha-In2Se3 using Angle-Resolved Polarized Raman Spectroscopy (ARPRS) with different excitation lasers. Our experimental findings supported by complementary Density Functional Theory calculations demonstrate that the light-matter interactions depend not only on the crystallographic orientation but also on the excitation energy. Scanning transmission electron microscopy (STEM) confirms the highly anisotropic 3R crystal structure of alpha-In2Se3. This anisotropy in crystal structure facilitates significant optical anisotropy, driven by a complex interplay of electron-photon and electron-phonon interactions, which is reflected in the complex nature of the Raman tensor elements. These anisotropy interactions extend to the materials electrical response under light illumination. Remarkably, the anisotropic photo-response can be tuned by both polarization and wavelength of the incident light, making In2Se3 a promising material for advanced polarization-sensitive photodetection applications. Comment: 19 pages, 6 figures, supporting information |
| Databáze: | arXiv |
| Externí odkaz: |
|