Physics Colloquium

Dr. Christoffer Kauppinen

VTT Technical Research Centre of Finland

Grass-like alumina: gradient refractive index anti-reflection coating via atomic layer deposition and hot water
 

Abstract:

Grass-like alumina (GLA) is a type of nanoporous antireflection (AR) coating , with a graded refractive index profile, providing broadband and omnidirectional AR performance. The GLA AR coating is fabricated using atomic layer deposition (ALD) of alumina and immersion in heated deionized water. Furthermore, as an ALD-based technique, the coating can be deposited conformally on surfaces with extreme topography. GLA can also be used as a scaffold to make electrodes, superhydrophobic AR coatings, and be used in other applications that require high specific surface area.