About: http://webisa.webdatacommons.org/157557812

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	A few types of photonic crystal are formed in nature; other types are fabricated, such as one-dimensional photonic crystals formed by stacking multiple dielectric layers, such as a Bragg mirror for example.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca