What we believe to be a new type of resonant coupling of an incident bulk wave into guided modes of a slab with a thick holographic grating is shown to occur in the presence of strong frequency detunings of the Bragg condition. This happens through the reflection of the strongly noneigen +1 diffracted order with the slab–grating boundaries, the resultant reflected waves forming a guided slab mode. Rigorous coupled-wave analysis is used for the numerical analysis of the predicted resonant effects. Possible applications include enhanced options for the design of multiplexing and demultiplexing systems, optical signal-processing devices, optical sensors, and measurement techniques.
© 2006 Optical Society of America
Diffraction and Gratings
Original Manuscript: June 6, 2005
Manuscript Accepted: August 31, 2005
D. R. Mason, S. J. Goodman, D. K. Gramotnev, and T. A. Nieminen, "Resonant coupling between bulk waves and guided modes in a dielectric slab with a thick holographic grating," Appl. Opt. 45, 1804-1811 (2006)