Sensitivity characteristics in nanosized coated long period gratings

被引：46
|
作者：
Cusano, Andrea
Iadicicco, Agostino
Pilla, Pierluigi
Cutolo, Antonello
Giordano, Michele
Campopiano, Stefania
机构：
[1] Univ Sannio, Dept Engn, Div Optoelect, I-8210 Benevento, Italy
[2] CNR, Inst Composite & Biomed Mat, I-80124 Naples, Italy
[3] Univ Naples Parthenope, Dept Technol, I-80131 Naples, Italy
来源：
APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 20期
关键词：
D O I：
10.1063/1.2388885
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
This work presents an experimental analysis of the sensitivity characteristics to the surrounding refractive index (SRI) in long period gratings coated with polymeric overlay with high refractive index and thickness values ranging in hundreds of nanometers. The presence of the coating induces the cladding to overlay mode transition depending on the overlay features and the SRI. The immediate consequence is a drastic modification of the sensitivity characteristics from the sublinear monotone behavior to a resonantlike shape. Here, the sensitivity characteristics of coated long period gratings have been investigated to outline their dependence on the overlay thickness and order mode. (c) 2006 American Institute of Physics.
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页数：3
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