2:45 PM - 3:00 PM
▲ [24p-E303-6] Narrowband Thermal Radiation from Superlattice Microcavity Consist of a Refractory Metal
Keywords:thermal radiation control, metal microstructure
We demonstrate a 2D superlattice microcavity array consisting of a refractory metal to realize bandwidth control of thermal radiation. A hybrid resonance mode is generated from the coupling of microcavity resonance and surface plasmon resonance by manipulating the excitation wavelength of each resonator in the superlattice microcavity structure. Moreover, the E-field amplitude of hybrid resonance mode is strongly dependents on the gap of the adjacent microcavities in the superlattice array. Thus, the radiation Q-factor is controlled by controlling the geometric structure of the superlattice microcavity array. Narrowband thermal radiation is analytically and experimentally observed in the hybrid resonance mode. This work provides a novel refractory metallic microstructure to control the radiation bandwidth for thermal energy systems.