Detection Wavelength Control of Uncooled Infrared Sensors Using Two-Dimensional Lattice Plasmonic Absorbers

摘要: Wavelength-selective uncooled infrared (IR) sensors are highly promising for a wide range of applications, such as fire detection, gas analysis and biomedical analysis. We have recently developed wavelength-selective IR using square lattice two-dimensional plasmonic absorbers (2-D PLAs). The PLAs consist periodic 2-D Au-based dimples, which allow photons to be manipulated surface plasmon modes. In the present study, detailed investigation into control detection wavelength was conducted by varying PLA structure. A comparison made between with triangular lattices that were fabricated complementary metal oxide semiconductor micromachining techniques. Selective enhancement responsivity could achieved, shorter than lattice. results indicate is determined reciprocal-lattice vector PLAs. ability in this manner enables application many types thermal sensors. obtained here represent an important step towards multi-color imaging region.