High-speed ultra-broadband detection based on an interfacial work function internal photoemission detector
Year: 2025
Type: article
Abstract: With the exponential growth in information transmission and the escalating demand for multi-band joint detection, high-speed ultra-broadband detectors play a crucial role in aerospace technology, national security, etc. The interfacial work function internal photoemission (IWIP) detector employs the multiple absorption mechanism comprehensively across different wavelength bands to achieve complete photon-type detection, which makes it possible to realize high-speed and ultra-broadband simultaneously. We propose a ratchet heterojunction IWIP (HEIWIP) detector, which shows 3–165 THz ultra-broadband coverage. The high-speed response is investigated in detail by both microwave rectification technology and high-speed modulated terahertz light. Up to 5.1 GHz, a 3 dB bandwidth is acquired in terms of microwave rectification measurements, and a 4.255 GHz inter-mode optical beat note signal was successfully detected. The ratchet HEIWIP detector not only fulfills the demands for ultra-broadband detection but also facilitates high-speed detection, thereby significantly broadening the scope of applications for ultra-broadband detectors.
Source: Optica
Authors: Siheng Huang, Xin Yuan, Xuhong Ma, Quan Yu, Ying Liu, Chenjie Pan, Cheng Tan, Gangyi Xu, Hua Li, Yueheng Zhang
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,208
OpenAlex ID: W4407911082