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1.
Experimental results on adiabatic coupling into SOI photonic Crystal coupled-cavity waveguides 总被引:1,自引:0,他引:1
P. Sanchis J. Marti W. Bogaerts P. Dumon D. Van Thourhout R. Baets 《Photonics Technology Letters, IEEE》2005,17(6):1199-1201
The experimental implementation of an adiabatic coupling technique for efficient coupling between photonic crystal single-line defect waveguides and coupled-cavity waveguides is reported. The samples were fabricated in a silicon-on-insulator substrate using 248-nm-deep ultraviolet lithography. Experimental results are compared with three-dimensional (3-D) finite-difference time-domain simulations. Furthermore, the discrepancies between two-dimensional and 3-D simulation results are analyzed. 相似文献
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John P George Jeroen Beeckman Wouter Woestenborghs Philippe F Smet Wim Bogaerts Kristiaan Neyts 《Nanoscale research letters》2013,8(1):62
Barium titanate (BaTiO3) thin films are prepared by conventional 2-methoxy ethanol-based chemical solution deposition. We report highly c-axis-oriented BaTiO3 thin films grown on silicon substrates, coated with a lanthanum oxynitrate buffer layer of 8.9 nm. The influence of the intermediate buffer layer on the crystallization of BaTiO3 film is investigated. The annealing temperature and buffer layer sintering conditions are optimized to obtain good crystal growth. X-ray diffraction measurements show the growth of highly oriented BaTiO3 thin films having a single perovskite phase with tetragonal geometry. The scanning electron microscopy and atomic force microscopy studies indicate the presence of smooth, crack-free, uniform layers, with densely packed crystal grains on the silicon surface. A BaTiO3 film of 150-nm thickness, deposited on a buffer layer of 7.2 nm, shows a dielectric constant of 270, remnant polarization (2Pr) of 5 μC/cm2, and coercive field (Ec) of 60 kV/cm. 相似文献
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Van Laere F. Bogaerts W. Dumon P. Roelkens G. Van Thourhout D. Baets R. 《Lightwave Technology, Journal of》2009,27(5):612-618
We report on compact focusing polarization diversity grating couplers in silicon-on-insulator, which can be used to overcome the polarization dependence of nanophotonic integrated circuits. The minimum fiber-to-fiber polarization dependent loss is 0.4 dB and the focusing grating couplers are as performant as standard 2-D-grating couplers without focusing. In addition, the focusing property of the gratings results in an 8-fold length reduction of the coupling structure as compared to standard nonfocusing 2-D-grating versions. 相似文献
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Bogaerts W. Selvaraja S. K. Dumon P. Brouckaert J. De Vos K. Van Thourhout D. Baets R. 《IEEE journal of selected topics in quantum electronics》2010,16(1):33-44