A Reconfigurable Polarimetric Photodetector Based on the MoS<sub>2</sub>/PdSe<sub>2</sub> Heterostructure with a Charge-Trap Gate Stack
Besides the intensity and wavelength, the ability to analyze the optical polarization of detected light can provide a new degree of freedom for numerous applications, such as object recognition, biomedical applications, environmental monitoring, and remote sensing imaging. However, conventional filt...
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/14/23/1936 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Besides the intensity and wavelength, the ability to analyze the optical polarization of detected light can provide a new degree of freedom for numerous applications, such as object recognition, biomedical applications, environmental monitoring, and remote sensing imaging. However, conventional filter-integrated polarimetric sensing systems require complex optical components and a complicated fabrication process, severely limiting their on-chip miniaturization and functionalities. Herein, the reconfigurable polarimetric photodetection with photovoltaic mode is developed based on a few-layer MoS<sub>2</sub>/PdSe<sub>2</sub> heterostructure channel and a charge-trap structure composed of Al<sub>2</sub>O<sub>3</sub>/HfO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> (AHA)-stacked dielectrics. Because of the remarkable charge-trapping ability of carriers in the AHA stack, the MoS<sub>2</sub>/PdSe<sub>2</sub> channel exhibits a high program/erase current ratio of 10<sup>5</sup> and a memory window exceeding 20 V. Moreover, the photovoltaic mode of the MoS<sub>2</sub>/PdSe<sub>2</sub> Schottky diode can be operated and manipulable, resulting in high and distinct responsivities in the visible broadband. Interestingly, the linear polarization of the device can be modulated under program/erase states, enabling the reconfigurable capability of linearly polarized photodetection. This study demonstrates a new prototype heterostructure-based photodetector with the capability of both tunable responsivity and linear polarization, demonstrating great potential application toward reconfigurable photosensing and polarization-resolved imaging applications. |
|---|---|
| ISSN: | 2079-4991 |