High sensitivity waveguide grating sensor based on radiative losses

被引：4

作者：

Kochergin, V ^{[1
]}

Avrutsky, I ^{[1
]}

Zhao, Y ^{[1
]}

机构：

[1] Wayne State Univ, Dept Elect & Comp Engn, Detroit, MI 48202 USA

来源：

BIOSENSORS & BIOELECTRONICS | 2000年 / 15卷 / 5-6期

关键词：

waveguide; grating coupler; radiation losses; sensors;

D O I：

10.1016/S0956-5663(00)00072-5

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

A scheme of a waveguide sensor utilizing an output grating coupler with the grating length less than the coupling length is analyzed. This is the new method for the evaluation of average thickness of the adsorbed layer. This method, based on measurements of radiation loss coefficients, is proposed. Sensitivity limits of such a scheme are discussed. The new scheme has strong response on formation on the adsorbed layer and relatively weaker response on the fluctuations of temperature and analyte concentration. New possibilities for multiparameter sensing are shown. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：283 / 289

页数：7

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