In this paper, a double-band visible-infrared photodetector absorber is proposed, which consists of a modified microbolometer and a metallic reflective layer which has a deep well. The simulated results show that the absorber proposed has high absorption peaks both at visible band (400–800 nm) and infrared band (8–12 μm), and the absorptivity at infrared band is more than 85% while the absorption rate at visible band exceeds 70%. By analyzing the simulation results, the absorption mechanism is discussed. The designed absorber not only has high absorption rate, but also realizes visible-infrared double band coaxial absorption with single pixel integration, hence it is favorable for various applications, such as night and day vision coaxial detecting, double band fusion detecting, and optical filter and bio-chemical sensor.

本文提出了一种双波段可见红外光电探测器吸收体，它由改进的测微辐射热计和具有深阱的金属反射层组成。模拟结果表明，所提出的吸收体在可见光波段（400–800 nm）和红外波段（8–12μm）均具有高吸收峰，红外波段的吸收率大于85％，而可见光波段的吸收率超过70％。通过分析仿真结果，讨论了吸收机理。设计的吸收器不仅吸收率高，而且还实现了单像素集成的可见红外双波段同轴吸收，因此非常适合夜视和同轴夜视同轴检测，双波段融合检测和滤光片等各种应用。和生化传感器。