Wide-/Narrow-Bandgap Heterojunction for High Performance Differential Photodetector with Tunable Response.

ABSTRACT: Amid the rapid advancement in modern photonics and artificial intelligence, optoelectronic devices with enhanced functionalities and high performance hold great promise for complex photonic integrated circuits. Herein, a novel tunable differential photodetector (DPD) is developed based on a wide-/narrow-bandgap semiconductor heterojunction, featuring a large conduction band offset at the heterojunction interface. Benefiting from the unique band alignment at the heterojunction interface, this device exhibits interesting characteristics:1) It offers two tunable operational modes, freely switchable between "differential mode" and "normal mode" only by adjusting the bias voltages; 2) While operating in "differential mode" under zero bias, the DPD exhibits high detectivity (4.5×10¹¹

SUBMITTER: Ren Z 

PROVIDER: S-EPMC12561176 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature