Optimization of finite-length input volume holographic grating couplers illuminated by finite-width incident beams

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

dc.contributor.author	Wu, S-D	en
dc.contributor.author	Glytsis, EN	en
dc.contributor.author	Gaylord, TK	en
dc.date.accessioned	2014-03-01T01:22:53Z
dc.date.available	2014-03-01T01:22:53Z
dc.date.issued	2005	en
dc.identifier.issn	0003-6935	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16704
dc.subject.classification	Optics	en
dc.subject.other	Coupled transmission line analysis	en
dc.subject.other	Grating couplers	en
dc.subject.other	Surface-relief grating couplers (SRGC)	en
dc.subject.other	Volume holographic grating couplers (VHGC)	en
dc.subject.other	Crosstalk	en
dc.subject.other	Electric fields	en
dc.subject.other	Integration	en
dc.subject.other	Light polarization	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Optical waveguides	en
dc.subject.other	Optimization	en
dc.subject.other	Perturbation techniques	en
dc.subject.other	Diffraction gratings	en
dc.title	Optimization of finite-length input volume holographic grating couplers illuminated by finite-width incident beams	en
heal.type	journalArticle	en
heal.identifier.primary	10.1364/AO.44.004435	en
heal.identifier.secondary	http://dx.doi.org/10.1364/AO.44.004435	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	A finite volume holographic grating coupler (VHGC) normally illuminated with various incident-beam profiles (such as a Gaussian beam, a flat cosine-squared beam, and an exponential-decay beam) with finite beam widths for input coupling is rigorously analyzed by use of the finite-difference frequency-domain method. The effects of the incident-beam width, the incident-beam position, the incident-beam profile, and the incident-beam angle of incidence on the input coupling efficiency are investigated. The optimum conditions for input coupling are determined. Both a VHGC embedded in the waveguide film region and a VHGC placed in the waveguide cover region are investigated. For a given finite VHGC, the input coupling efficiencies are strongly dependent on incident-beam widths, incident-beam positions, and incident-beam angles of incidence, but are only weakly dependent on incident-beam profiles. (c) 2005 Optical Society of America.	en
heal.publisher	OPTICAL SOC AMER	en
heal.journalName	Applied Optics	en
dc.identifier.doi	10.1364/AO.44.004435	en
dc.identifier.isi	ISI:000230665200002	en
dc.identifier.volume	44	en
dc.identifier.issue	21	en
dc.identifier.spage	4435	en
dc.identifier.epage	4446	en