Name	Info	Provider	Link
	free resource	Optica Publishing Group	https://opg.optica.org/abstract.cfm?URI=oe-19-12-11507
Full text from	free resource	CORE	https://core.ac.uk/reader/397027?utm_source=linkout
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:21716382