Zero-Biased and Broadband (0.1-1.5 THz) Terahertz Detector Using Dirac Semimetal-Platinum Telluride (PtTe2)

This letter demonstrates the Dirac semimetal-platinum telluride (PtTe2)-based terahertz detector. The reported detector has a broadband response ranging from 0.1 to 1.5 THz at room temperature. The antenna-coupled PtTe2 device can perform at zero bias with a maximum responsivity of 16.4 A/W at 0.2 THz. In contrast, the two fold increase in responsivity is observed with bias (100 mV). Furthermore, even at the highest source frequency (1.5 THz), the detector at zero bias exhibits higher responsivity (6.1 A/W), lower noise-equivalent power (1.5 x 10(-11) WHz(-1/2)), and higher detectivity (5.3 x 10(9) cm center dot Hz(0.5)/W). Therefore, the proposed PtTe2-based detector manifests better performance than variously reported terahertz detectors. These improved device performances and one mask fabrication process validate their worth for detection and sensing in the terahertz domain.

Automated summary

This study reports a Dirac semimetal-platinum telluride (PtTe2)-based terahertz detector with a broadband response and improved performance.