31 July 2014 Negative Goos-Hänchen shift in reflection from subwavelength gratings
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Abstract
A negative Goos–Hänchen (GH) shift of light beam reflecting from planar microphotonic structures consisting of two parallel dielectric subwavelength diffraction gratings is predicted. The phenomenon occurs because the energy flow of the mode guided in the subwavelength structure is predominantly directed in the opposite direction to the energy flow of the incident beam. The numerical calculations show that the negative GH shift can reach approximately six times that of the wavelength in realistic structures, so that the phenomenon can be experimentally observed. In addition to the negative lateral shift, the focusing of the beam in reflection from the grating is also observed as a secondary effect.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yu-Chieh Cheng, Yu-Chieh Cheng, Kestutis Staliunas, Kestutis Staliunas, } "Negative Goos-Hänchen shift in reflection from subwavelength gratings," Journal of Nanophotonics 8(1), 084093 (31 July 2014). https://doi.org/10.1117/1.JNP.8.084093 . Submission:
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