The method that we have developed [ BorsboomP-P., Ph.D. dissertation ( Delft University of Technology, Delft, The Netherlands); BorsboomP-P. FrankenaH. J., J. Opt. Soc. Am. A 12, 1134– 1141 ( 1995)] is successfully applied to a two-dimensional focusing grating coupler. The field in the focal region has been determined for symmetrical chirped gratings consisting of as many as 124 corrugations. The intensity distribution in the focal region agrees well with the approximate predictions of geometrical optics. In the case of short focusing grating couplers high-frequency intensity variations are observed in the focal region.
© 1995 Optical Society of America
Original Manuscript: July 29, 1994
Revised Manuscript: November 28, 1994
Manuscript Accepted: January 5, 1995
Published: May 1, 1995
P-P. Borsboom and H. J. Frankena, "Field analysis of two-dimensional focusing grating couplers," J. Opt. Soc. Am. A 12, 1142-1146 (1995)