About: http://webisa.webdatacommons.org/175601706

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 photonic crystal is a material with a periodic index modulation that restricts the transmission of light to a defined set of wavevectors or ???bands???.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr