Special Section on Nanophotonic Materials and Devices

Negative Goos-Hänchen shift in reflection from subwavelength gratings

[+] Author Affiliations
Yu-Chieh Cheng

Universitat Politecnica de Catalunya, Departament de Fisica i Enginyeria Nuclear, Colom 11, Terrassa, Barcelona 08223, Spain

Kestutis Staliunas

Universitat Politecnica de Catalunya, Departament de Fisica i Enginyeria Nuclear, Colom 11, Terrassa, Barcelona 08223, Spain

Institucio Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys 23, Barcelona 08010, Spain

J. Nanophoton. 8(1), 084093 (Jul 31, 2014). doi:10.1117/1.JNP.8.084093
History: Received March 29, 2014; Revised July 2, 2014; Accepted July 7, 2014
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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.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Topics

Reflection

Citation

Yu-Chieh Cheng and Kestutis Staliunas
"Negative Goos-Hänchen shift in reflection from subwavelength gratings", J. Nanophoton. 8(1), 084093 (Jul 31, 2014). ; http://dx.doi.org/10.1117/1.JNP.8.084093


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