Ultracompact biochemical sensor built with two-dimensional photonic crystal microcavity
Ultracompact biochemical sensor built with two-dimensional photonic crystal microcavity
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DOI：
10.1364/ol.29.001093
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发表时间：
2004-05-15
期刊：
影响因子：
3.6
通讯作者：
Girolami, G
中科院分区：
文献类型：
--
作者：
Chow, E;Grot, A;Girolami, G
我们报告了基于二维光子晶体微腔的超紧凑生化传感器的实验演示。该微腔在绝缘体上硅基板上制造，设计为具有接近 1.5 μm 的谐振波长 (lambda)。传感器的透射光谱是在 n = 1.0 至 n = 1.5 范围内的不同环境折射率下测量的。通过观察谐振波长的变化，可以明显看出环境折射率 Delta = 0.002 的变化。绝对折射率与谐振波长之间的对应关系与数值计算一致，精度在4%以内。 5% 甘油混合物中水的蒸发也用于证明原位时间分辨传感的能力。 (C) 2004 美国光学学会
We report an experimental demonstration of an ultracompact biochemical sensor based on a two-dimensional photonic crystal microcavity. The microcavity, fabricated on a silicon-on-insulator substrate, is designed to have a resonant wavelength (lambda) near 1.5 mum. The transmission spectrum of the sensor is measured with different ambient refractive indices ranging from n = 1.0 to n = 1.5. From observation of the shift in resonant wavelength, a change in ambient refractive index of Deltan = 0.002 is readily apparent. The correspondence between absolute refractive index and resonant wavelength agrees with numerical calculation to within 4% accuracy. The evaporation of water in a 5% glycerol mixture is also used to demonstrate the capability for in situ time-resolved sensing. (C) 2004 Optical Society of America