منابع مشابه
Antireflection gratings for a photonic-crystal flat lens.
A dielectric structure with effective permittivity and permeability close to -1 operating for propagative waves at optical wavelengths is proposed. This structure is a two-dimensional photonic crystal with refractive index -1, coated by appropriate antireflection gratings. Numerical simulations involving a flat lens made of this optimized crystal illustrate the improvements that antireflection ...
متن کاملBroadband super-collimation in a hybrid photonic crystal structure Citation
We propose a photonic crystal (PhC) structure that supports super-collimation over a large frequency range (over 4 times that of a traditional square lattice of holes). We theoretically and numerically investigate the collimation mechanism in our structure, in comparison to that of two other frequently used related PhC structures. We also point out the potential importance of our proposed struc...
متن کاملBroadband Dispersion Characterization of Chalcogenide Tapered Photonic Crystal Fiber
Group-velocity dispersion of birefringent GeAsSe tapered PCF is directly measured over 1900-2300nm range using all-fiber Mach-Zehnder interferometer. We experimentally prove that zero-dispersion wavelength of chalcogenide PCFs can be shifted to thulium/holmium doped silica emission band. OCIS codes: (060.2270) Fiber characterization; (260.2030) Dispersion; (060.2390) Fiber optics, infrared
متن کاملBroadband super-collimation in a hybrid photonic crystal structure.
We propose a two dimensional (2D) photonic crystal (PhC) structure that supports super-collimation over a large frequency range (over 4 times that of a traditional square lattice of holes). We theoretically and numerically investigate the collimation mechanism in our 2D structure, in comparison to that of two other frequently used related PhC structures. We also point out the potential importan...
متن کاملFurther guidance for broadband antireflection coating design.
Recent investigations have added to and refined the understanding of the behavior of broadband antireflection coating designs and provided further guidance for achieving more nearly optimal designs. The ability to optimize designs wherein the overall optical thickness of the design is constrained to a specific value has allowed this investigation. A broader bandwidth than previously reported ha...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the European Optical Society: Rapid Publications
سال: 2012
ISSN: 1990-2573
DOI: 10.2971/jeos.2012.12008