Sensitivity-enhanced uncooled infrared detector based on a Lamb wave sensor with polydopamine coating
| Autor: | Wen-Fei Dong, Minghui Zan, Lianqun Zhou, Chuanyu Li, Jia Yao, Guo Zhen, Kong Hui, Yuguo Tang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) Infrared business.industry Detector 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Lamb waves Coating Modulation 0103 physical sciences engineering Optoelectronics Infrared detector 0210 nano-technology business Sensitivity (electronics) Order of magnitude |
| Zdroj: | Applied Physics Letters. 114:183505 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | In this letter, we demonstrate an uncooled, sensitivity-enhanced infrared (IR) detector based on a Lamb wave sensor coated with polydopamine (PDA). The real-time resonant frequency responses of the sensors with and without PDA coating were measured as functions of IR intensity. Compared to the traditional Lamb wave sensor, the PDA-coated Lamb sensor exhibits a highly linear relationship between resonance frequency and IR intensity, and the slope representing the sensitivity of IR detection is nearly one order of magnitude higher. The enhanced sensitivity is mainly attributed to the optical-thermal transition of PDA nanoparticles rather than the modulation of the thermal-acoustic effect. This mechanism for achieving highly sensitive uncooled IR detectors holds great promise for application in photo-thermal therapy along with other military and civilian fields. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|