Aaswath Raman1
University of California, Los Angeles1
Aaswath Raman1
University of California, Los Angeles1
Thermal emission over infrared wavelengths is ubiquitious making its control of great importance to a wide range of applications. In this talk, we will first introduce a new photonics-based framework to controlling both spectral and directional emissivity, gradient epsilon near zero (ENZ) materials. We will highlight demonstrations using both phonon-polariton-based materials as well as doped semiconductors, demonstrating both spectral and broadband directional tunability. We will next discuss radiative cooling applications enabled by such spectrally and directionally emissive materials. First we will introduce passive freezing desalination enabled by radiative cooling, as well as the radiative cooling of vertical facades in hot urban environments.