Fig. 5From: An Ingenious Super Light Trapping Surface Templated from Butterfly Wing ScalesSchematic illustration of the multiple reflection and refraction occurred in the SiO2 negative replicas and the reflectance spectroscopy analysis of the SiO2 negative replica. a After multiple reflections and refractions, incident light traveled for a longer distance, and only a small part of the solar energy was reflected back to the air. b The average reflection of the SiO2 negative replicas was about 20 % which was just 1/4 of the reflection of the flat plate without the negative quasi-honeycomb-like structureBack to article page