Department of Electrical and Computer Engineering, University of Alabama in Huntsville, Huntsville, Alabama 35899, USA.
Opt Lett. 2011 Dec 15;36(24):4764-6. doi: 10.1364/OL.36.004764.
A superperiodic metal nanoslits device is a surface plasmon resonance optical diffraction grating in which each line of the grating consists of an array of finite number metal nanoslits. The metal nanoslits, upon optical excitations, support localized surface plasmon resonance. The superperiod of the nanoslits causes the coherent radiation of the surface plasmon resonance into the far field with angular dispersion. Therefore, localized surface plasmon resonance in the metal nanoslits can be measured with a CCD or a linear photodetector array. In this Letter, we describe a surface plasmon resonance spectral sensor using a superperiodic gold nanoslits array without using an external optical spectrometer.
超周期金属纳米狭缝器件是一种表面等离激元共振光学衍射光栅，其中光栅的每条线由有限数量的金属纳米狭缝组成。金属纳米狭缝在光激发下支持局域表面等离激元共振。纳米狭缝的超周期导致表面等离激元共振相干辐射到远场，具有角色散。因此，金属纳米狭缝中的局域表面等离激元共振可以用 CCD 或线性光电探测器阵列来测量。在这封信中，我们描述了一种使用超周期金纳米狭缝阵列的表面等离激元共振光谱传感器，而无需使用外部光学光谱仪。
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