A terahertz photo-thermoelectric (PTE) detector is proposed by integrating the metamaterial absorber with a metal thermocouple. The incident terahertz wave that is absorbed by the metamaterial absorber changes into heat, then the heat changes into electricity by using the metal thermocouple. The absorption performances, photo-thermal, and PTE conversion characteristics are investigated by the full vector finite element method. Simulation results show that the device can achieve near-perfect absorption in 1 THz, and exhibits a responsivity and noise equivalent power of 35 mV/W and 6.6$\times$10⁻⁶ W/Hz${}^{\mathrm{1∕2}}$, respectively. Meanwhile, with the advantages of room-temperature workability, wide-angle, high responsivity, simple structure, and easy integration, the device has potential applications in terahertz photoelectric detection, sensing, and imaging.

通过将超材料吸收器与金属热电偶集成在一起，提出了一种太赫兹光热电 (PTE) 探测器。被超材料吸收体吸收的入射太赫兹波转化为热能，再利用金属热电偶将热能转化为电能。通过全矢量有限元方法研究了吸收性能、光热和 PTE 转换特性。仿真结果表明，该器件可以在 1 THz 范围内实现近乎完美的吸收，响应度和噪声等效功率分别为 35 mV/W 和 6.6$\times$10 ^-6瓦/赫兹${}^{\mathrm{1∕2}}$， 分别。同时，该器件具有常温可工作、广角、高响应、结构简单、易于集成等优点，在太赫兹光电检测、传感和成像方面具有潜在的应用前景。