Optimization of sawtooth surface-relief gratings: Effects of substrate refractive index and polarization

Wu, S-D; Gaylord, TK; Glytsis, EN

dc.contributor.author	Wu, S-D	en
dc.contributor.author	Gaylord, TK	en
dc.contributor.author	Glytsis, EN	en
dc.date.accessioned	2014-03-01T01:24:49Z
dc.date.available	2014-03-01T01:24:49Z
dc.date.issued	2006	en
dc.identifier.issn	0003-6935	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17449
dc.subject.classification	Optics	en
dc.subject.other	Diffraction efficiency	en
dc.subject.other	Incident polarization	en
dc.subject.other	Sawtooth surface-relief gratings (SRG)	en
dc.subject.other	Light polarization	en
dc.subject.other	Optimization	en
dc.subject.other	Refractive index	en
dc.subject.other	Silicon	en
dc.subject.other	Surface structure	en
dc.subject.other	Diffraction gratings	en
dc.title	Optimization of sawtooth surface-relief gratings: Effects of substrate refractive index and polarization	en
heal.type	journalArticle	en
heal.identifier.primary	10.1364/AO.45.003420	en
heal.identifier.secondary	http://dx.doi.org/10.1364/AO.45.003420	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	The effect of the refractive index of the substrate together with the incident polarization on the optimization of sawtooth surface-relief gratings (SRGs) is investigated. The global optimum diffraction efficiencies of the -1st forward-diffracted order of sawtooth SRGs are 63.3% occurring at n(2) = 1.47 for TE polarization and 73.8% occurring at n(2) = 2.88 for TM polarization. Incident TE polarization has higher optimum diffraction efficiency than TM polarization for all n(2) < 1.85. In contrast, TM polarization has higher optimum diffraction efficiency than TE polarization for all n(2) > 1.85. A polymer (n(2) = 1-5) Optimum sawtooth SRG exhibits 62.6% efficiency for TE polarization. A silicon (n(2) = 3.475) optimum sawtooth SRG exhibits 68.6% efficiency for TM polarization. These sawtooth SRGs are compared to right-angle-face trapezoidal SRGs. It is found that the optimum profiles of right-angle-face trapezoidal SRGs have only very slightly increased efficiencies over sawtooth SRGs (0.04% for TE and 0.55% for TM). (D 2006 Optical Society of America.	en
heal.publisher	OPTICAL SOC AMER	en
heal.journalName	Applied Optics	en
dc.identifier.doi	10.1364/AO.45.003420	en
dc.identifier.isi	ISI:000237668400003	en
dc.identifier.volume	45	en
dc.identifier.issue	15	en
dc.identifier.spage	3420	en
dc.identifier.epage	3424	en