这篇文章记录了锁相放大器电压计算方法
The ability to convert light into an electrical signal with high efficiencies and controllable dynamics,
is a major need in photonics and optoelectronics. In the Terahertz (THz) frequency range, with its
exceptional application possibilities in high data rate wireless communications, security, nightvision, biomedical or video-imaging and gas sensing, detection technologies providing efficiency and
sensitivity performances that can be “engineered” from scratch, remain elusive. Here, by exploiting
the inherent electrical and thermal in-plane anisotropy of a flexible thin flake of black-phosphorus (BP),
we devise plasma-wave, thermoelectric and bolometric nano-detectors with a selective, switchable
and controllable operating mechanism. All devices operates at room-temperature and are integrated
on-chip with planar nanoantennas, which provide remarkable efficiencies through light-harvesting in
the strongly sub-wavelength device channel. The achieved selective detection (∼5–8 V/W responsivity)
and sensitivity performances (signal-to-noise ratio of 500), are here exploited to demonstrate the first
concrete application of a phosphorus-based active THz device, for pharmaceutical and quality control
imaging of macroscopic samples, in real-time and in a realistic setting.
