On the dual core anisotropic metamaterial clad polarization splitter

Giant Nonlinear AlGaAs-Doped Glass Photonic Crystal Fibers for Efficient Soliton Generation at Femtojoule Energy

“…At low values of , the fiber dispersion is in the normal dispersion regime, with the increase in the value of , the magnitude of dispersion decreases, finally above certain value of (i.e., 1.8 μm), the fiber becomes anomalously dispersive at telecommunication wavelength. Note that the fiber with = 1.9 μm exhibits low and uniform anomalous dispersion (5) . over a wide range of operating wavelengths.…”

“…Alternatively, large nonlinearity can be achieved by doping semiconducting material with fiber material. In this case, not only the third order susceptibility but also fifth order optical susceptibility χ (5) is plays an important role. The larger value of χ (5) in semiconductor doped glass PCFs also affect the soliton propagation characteristics.…”

“…In this case, not only the third order susceptibility but also fifth order optical susceptibility χ (5) is plays an important role. The larger value of χ (5) in semiconductor doped glass PCFs also affect the soliton propagation characteristics. Therefore, we assume that the PCF core is doped with AlGaAs and proceed to estimate third as well as fifth order nonlinearities.…”

“…Our choice of AlGaAs doping is motivated by the fact that it possesses a very large third (χ (3) ) and fifth (χ (5) ) order susceptibilities in comparison to silica. This necessitated evaluation of two effective nonlinear co-efficients of the designed fiber, one due to the usual third order nonlinear coefficient γ AlGaAs = (2πn 2 /λA eff ) × 10 3 W −1 km −1 , the other one γ AlGaAs is due to the fifth order susceptibility χ (5) , which is defined as γ AlGaAs = (2πn 4 /λA 2 eff ) × 10 3 W −2 km −4 [30], where n 2 = 3χ (3) 8n 0 and n 4 = 5χ (5) 16n 0 , n 0 is the linear refractive index. For AlGaAs, n 2 = 1.5 × 10 −13 cm 2 /W [28] and n 4 = −5 × 10 −23 cm 4 /W 2 [28].…”

Multi-function beam control of terahertz wave by hybrid metamaterial

“…It can be a key optical device in optical systems such as optical communication [4] and optical switches [5,6]. Recently, research on polarization devices suitable for the visible and infrared regions [7][8][9][10][11][12][13][14] has become increasingly mature, and terahertz polarization devices have also begun to develop due to the wide application of terahertz electromagnetic waves (with frequency between 0.1 and 10 THz). At present, a considerable proportion of terahertz polarization devices are realized on fiber [15][16][17], metasurface [18][19][20][21][22][23][24] and photonic crystal [25,26] structures.…”