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Showing 1 to 7 of 7 for “"gradient refractive index"”.
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Porous silicon as a platform for gradient refractive index photonics
… electrochemically etching bulk Silicon (Si). The refractive index of PSi is readily modulated by the electrochemical current density, making PSi inherently applicable to gradient refractive index (GRIN) applications. A GRIN broadly refers to a spatially-varying refractive index, whether discrete …
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Creation of 3-dimensional micro-optical materials
… phenomena, such as photonic band gaps, negative refractive index, transformation optics, and sub-diffraction limit focusing, to name a few. These phenomena have great implications for our ability to control light, whether it is in its spectral emission and absorption, in directional control …
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THz polaritonics : control, confinement, and strong light-matter interactions
… a cutoff-wavelength for operation and design of gradient refractive index devices. In the short wavelength limit, where the structures are termed photonic crystals, our work challenged the universally used definition of the Brillouin zone and presented an alternative definition that was valuable …
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Realization of a 3D gradient index medium in porous silicon
… electrochemical porosification, the material’s refractive index is defined by modulating the current density along the etch direction to change the porosity in either periodic or continuous fashion, making PSi an excellent materials platform for a variety of photonic and gradient refractive …
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Tunable Liquid Crystal Photonic Devices
… of external spatial light modulator. Different gradient profiles are obtained by using different photomasks. The nanoscale LC droplets are randomly distributed within the polymer matrix, so that the devices are polarization independent and exhibit a fast response time. Because of the small …