US 7,486,845 B2
	Waveguide polarization beam splitters and method of fabricating a waveguide wire-grid polarization beam splitter
Charles T. Black, New York, N.Y. (US); Gian-Luca Bona, San Jose, Calif. (US); Timothy J. Dalton, Ridgefield, Conn. (US); Nicholas C. M. Fuller, Ossining, N.Y. (US); Roland Germann, Wangen (Switzerland); Maurice McGlashan-Powell, Mount Vernon, N.Y. (US); Chandrasekhar Narayan, San Jose, Calif. (US); and Robert L. Sandstorm, Chestnut Ridge, N.Y. (US)
Assigned to International Business Machines Corporation, Armonk, N.Y. (US)
Filed on Oct. 11, 2007, as Appl. No. 11/870,463.
Application 11/870463 is a division of application No. 11/415923, filed on May 01, 2006, granted, now 7,298,935, filed on Nov. 20, 2007.
Prior Publication US 2008/0175527 A1, Jul. 24, 2008
Int. Cl. G02B 6/00 (2006.01); G02B 6/10 (2006.01)

U.S. Cl. 385—11  [385/130; 385/131; 359/495]

2 Claims

1. An optical waveguide polarization beam splitter, wherein said beam splitter comprises a wire-grid array in said waveguide so as to facilitate the transmission or reflection of light propagated within said waveguide in dependence upon incident polarization of the propagated light, said beam splitter comprising a ridged waveguide structure having intersecting waveguide sections extending at 90 degrees relative to each other; a parallel metal wire-grid row with 50-100 nm diameter wire pores and 150-200 nm wire spacing extending diagonal across the intersection of said waveguide sections; and a strippable diblock copolymer material covering said metal wire grid pores.