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A novel ultra-low loss single-mode hollow-core waveguide using high-contrast grating (HCG) is proposed and simulated. The loss can be as low as 0.006 dB/m, three orders of magnitude lower than the state-of-art chip-scale waveguides.
We demonstrate an Er doped fiber laser line source whose output coupler is a 9 cm, 45deg tilted fiber grating. Our approach shows potential for improved efficiency and simplicity over previously described line sources.
We show the effects of shrinking the high contrast grating size on a wavelength-tunable VCSEL experimentally and theoretically. With a grating having only 4 periods, we demonstrate the fastest tunable VCSEL with speed >25 MHz.
In this paper, the first direct mapping of the UV SPPs on an Al2O3/Al surface is studied. A near field scanning optical microscope (NSOM) system is set up for measurement in the UV domain. Numerical modeling results are also presented to analyze the distribution properties of the UV SPPs.
Hollow-core waveguides based on high contrast gratings are analyzed using exact analytical formulation. We obtain dispersion diagrams and propose a planar geometry similar to a heterostructure to confine the light two dimensionally in these waveguides.
We will discuss extraordinary properties of a single-layer one-dimensional high contrast grating (HCG). Tunable HCG-VCSELs are fabricated with 8000 times size reduction in the tunable mirror size and 160 times improved tuning speed of 63 ns.
We combine plasmonic grating structures with commercially available semiconductor laser diode packages to realize a prototype miniaturized chemical/bio-sensor.
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