Si-based photonic crystals
Broadening of Omnidirectional Photonic Band Gap in Si-Based One Dimensional Photonic Crystals
... of photonic crystals (PCs) for understanding their various properties and potential ...applications. Photonic crystals are structures of materials with periodically modulated dielectric ...
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Design, fabrication and Optical Characterization of Multi Component Photonic Crystals for Integrated Si Microphotonics
... elements based on one-dimensional (1D) multi-component photonic crystal ...in Si PCs has been demonstrated using the map of transmission ...multi-component Si PCs can be considered as an ...
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Alignment of liquid crystal E7 in composite photonic crystals based on single crystal silicon
... Figure 3a shows polarized transmission spectra of grooved Si before (Fig. 3a) and after the LC infiltration (Fig. 3b). A characteristic feature of the obtained spectra is the very low transmittance at short ...
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Omnidirectional Photonic Band Gap Expansion In Graphene Based One Dimensional Photonic Crystals
... material si by Graphene with constant the value of gradual constant and that the ODR range for one-dimensional GSPC structure is more than that of conventional PC and simple graded ...
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Germanium Based Two Dimensional Photonic Crystals: The Hexagonal and Honeycomb Lattices
... gap. Photonic band gap appears for almost all structures with the variation of the radius, as shown in the gap ...For photonic crystal structures composed of Ge rods in air, it was found that, with the ...
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Tunable photonic structures based on silicon and liquid crystals
... tunable photonic devices based on grooved silicon, serving as one-dimensional (1D) photonic ...these photonic structures are as follows: the large refractive index contrast, in-plane moulding ...
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Optical spectra of two dimensional photonic crystal bars based on macroporous Si
... Experimental investigations of optical properties of two-dimensional (2D) photonic crystals (PCs) based on macroporous silicon have been undertaken in Refs. 1–7. Due to the high aspect ratio this ...
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Double Cavity Fabry Perot Resonators Based on One Dimensional Silicon Photonic Crystals
... The introduction into 1D PhC instead of single cavity (as shown in Fig. 1a) two cavities separated by the common mirror, leads to the formation of double-cavity conjugated FP resonators (Fig. 1b). Transfer Matrix Method ...
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Optical characteristics of ordinary and tunable 1D Si photonic crystals in the mid infrared range
... grooved Si structures with different lattice constants ranging from 2 to 6 µm and a variety of lattice periods were designed and ...1D photonic crystal can be used from near to far infrared range and are ...
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Design of 1D composite photonic crystals with an extended photonic band gap
... odic multilayer system, light of any wavelength can be lo- calized. Zhang et al. 7 have shown both theoretically and experimentally that for / 4 multilayers with high refractive indices and an optical contrast ⌬n = ...
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Wave Transmission in Dispersive Si Based One Dimensional Photonic Crystal
... of photonic crystals (PCs) which are artificial structures with peri- odically modulated dielectric constants has been attract- ing a great deal of interest among researchers ...forbidden photonic ...
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Analytical Study Of Light And Liquid Crystals Reorientation In Anistropic Photonic Crystals Using One-Dimension Finite Difference Time Domain (FDTD) Method
... After the proposal by Yablonovitch in 1993, fabrication of PCs has been investigated intensively [5]. Various techniques to fabricate PCs such as electron-beam lithography, self-multiphoton polymerization, semiconductor ...
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Improve the Efficiency of Scintillation Detectors Using Reflectors Based on Photonic Crystals Arrays
... lector around the surface of the scintillation volume. Scintillation detectors are widely used in nuclear medicine. The efficiency is an important parameter for characterizing the capability of the detectors. The ...
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Magnetoelasticity of Fe–Si single crystals
... Magnetostriction measurements were carried out using the standard strain gauge method in a 20 kOe uniform mag- netic field. The field was produced by electromagnets and was measured via a Hall probe. Appling the field ...
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Active slow light in silicon photonic crystals : tunable delay and Raman gain
... Such an approach was first demonstrated by Xu et al. [17] in a com- pact structure consisting of two ring resonators (Fig. 3.4b). Tuning was accomplished by injecting free carriers in the same region where light was ...
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Analysis of Post-Wall Waveguides and Circuits Using a Model of Two-Dimensional Photonic Crystals
... two-dimensional photonic crystal waveguide formed by parallel circular cylinders infinitely long extended along the vertical direction (no field variations along vertical ...circuits based on the model ...
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Structural characterization of thin film photonic crystals
... The polystyrene spheres are then removed by heat treat- ment to 550 °C. The spheres are burnt out and the titania network densifies, resulting in air pores remaining behind in a titania matrix. Further details of the ...
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Photonic crystals as functional mirrors for semiconductor lasers
... a photonic crystal with the frequency domain approach, we need only define the unit cell and then apply periodic boundary conditions at the cell ...the photonic crystals in the remainder of this ...
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Light propagation in layered photonic crystals with admixture layers
... The method applied for calculating the polariton excitation spectra is rather similar to those used in cases of other quasi-particle excitations, like electronic, phononic etc. In the present work we employ the ...
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Electromagnetic field measurements inside photonic crystals developing a photonic free electron laser
... Free-electron lasers (FEL) are very different to photonic free-electron lasers (pFEL). FELs are devices that use a alternating static magnetic field to con- vert kinetic energy of relativistic electrons into ...
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