On-chip Si/SiOx microtube refractometer

被引：96

作者：

Bernardi, A. ^{[1
,2
]}

Kiravittaya, S. ^{[3
]}

Rastelli, A. ^{[1
]}

Songmuang, R. ^{[3
]}

Thurmer, D. J. ^{[1
]}

Benyoucef, M. ^{[1
,3
]}

Schmidt, O. G. ^{[1
]}

机构：

[1] IFW Dresden, Inst Integrat Nanosci, D-01069 Dresden, Germany

[2] Esfera UAB, CSIC, Inst Ciencia Mat Barcelona, Bellaterra 08193, Spain

[3] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 09期

关键词：

D O I：

10.1063/1.2978239

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors fabricate rolled up microtubes consisting of Si/SiO(x) on Si substrate and analyze the possibility to use them as a refractometric sensor. An aqueous sugar solution is inserted into the microtube, which leads to a change in refractive index and, as a result, to a detectable spectral shift of the whispering gallery modes. Experimental results can fit well with finite-difference time-domain simulations, which are used to determine the sensitivity of this tube refractometer. The ratio of spectral sensitivity to channel cross-sectional area of the refractometer is particularly striking and allows analysis of fluid volumes in the range of femtoliters. A comparative discussion with other existing refractometer schemes concludes this work. (c) 2008 American Institute of Physics.

引用

页数：3

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