PROJECT TITLE :

Mie Scattering-Enhanced Fiber-Optic Refractometer

ABSTRACT:

A kind of biconically-tapered optical fiber (BTOF) modified by silica nanospheres is proposed to implement detection of refractive index (RI), especially low RI, with strong nonlinearity and enhanced sensitivity; this idea arose from an interesting experiment with a BTOF whose surface was very rough. The mechanisms of the nonlinear characters are investigated and explained by the coupling effects of Mie scattering and multimode propagation, and this phenomenon is repeated in several experiments with different fibers. Measured sensitivity magnification of more than 100 from a 2.8-$mu{rm m}$-thick and 14-mm-long BTOF after modification by 400-nm silica nanospheres is shown in this letter.


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ABSTRACT:The electromagnetic scattering of chiral metamaterials is simulated with the Mie series method. Based on the spherical harmonics vector function in chiral metamaterials, the electromagnetic fields inside and outside of

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