Controllable Goos–Hänchen shift and optical switching in an Er^3 +-doped yttrium aluminum garnet crystal

Abstract

We propose an efficient scheme to control Goos–Hänchen (GH) shifts of the reflected and transmitted beams in a cavity containing Er3 + -doped yttrium-aluminum-garnet (YAG) crystal with a four-level Er3 + ionic system. It is found that both the values and signs of the reflected and transmitted GH shifts can be coherently controlled by tuning the relevant optical parameters, such as the incoherent pumping rate, and the intensity and detuning of the driving field. Furthermore, we propose a scheme for such a configuration of the reflected GH shift as a family of reflection-type optical switchings. It is shown that the average port spacing and reflectivity of the optical switching can reach approximately 1.03 mm and 16.88, respectively, which indicate the high performance of switching function. Our proposal may provide a possibility to implement optically tuned optical switching.

Goos–Hänchen and Imbert–Fedorov shifts of the Airy beam in dirac metamaterials

“…With the development of novel materials and structures, the GH and IF shifts can be enhanced and modulated effectively in various materials, such as graphene [6][7][8][9][10][11], weakly absorbing dielectric [12][13][14][15], photonic crystal [16][17][18], plasmonics [19,20] and nonoptical systems [21][22][23][24][25]. In addition, the GH and IF shifts have potential applications in optical sensors [26,27], image edge detection [28] and optical switches [29,30].…”

Theoretical Enhancement of the Goos–Hänchen Shift with a Metasurface Based on Bound States in the Continuum

“…It has been studied in various wavebands, including the visible, infrared, terahertz, and microwave wavebands [ 4 , 5 , 6 , 7 ]. It has also been widely used in sensors, optical switches, polarization splitting, and other fields [ 8 , 9 , 10 ].…”