Cho Seongman, Ciappesoni Mark A, Allen Monica S, Allen Jeffery W, Leedy Kevin D, Wenner Brett R, Kim Sung Jin
Department of Electrical and Computer Engineering, University of Miami, Coral Gables, FL 33146, United States of America.
Nanotechnology. 2018 Jul 13;29(28):285201. doi: 10.1088/1361-6528/aabd6b. Epub 2018 Apr 11.
Plasmon based field effect transistors (FETs) can be used to convert energy induced by incident optical radiation to electrical energy. Plasmonic FETs can efficiently detect incident light and amplify it by coupling to resonant plasmonic modes thus improving selectivity and signal to noise ratio. The spectral responses can be tailored both through optimization of nanostructure geometry as well as constitutive materials. In this paper, we studied various plasmonic nanostructures using gold for a wideband spectral response from visible to near-infrared. We show, using empirical data and simulation results, that detection loss exponentially increases as the volume of metal nanostructure increases and also a limited spectral response is possible using gold nanostructures in a plasmon to electric conversion device. Finally, we demonstrate a plasmon FET that offers a broadband spectral response from visible to telecommunication wavelengths.
基于表面等离子体激元的场效应晶体管（FET）可用于将入射光辐射诱导的能量转换为电能。等离子体激元FET可以通过耦合到共振等离子体激元模式来有效地检测入射光并对其进行放大，从而提高选择性和信噪比。光谱响应可以通过优化纳米结构几何形状以及组成材料来进行调整。在本文中，我们研究了使用金的各种等离子体激元纳米结构，以实现从可见光到近红外的宽带光谱响应。我们通过实验数据和模拟结果表明，随着金属纳米结构体积的增加，检测损耗呈指数增加，并且在等离子体激元到电转换器件中使用金纳米结构只能实现有限的光谱响应。最后，我们展示了一种等离子体激元FET，它能提供从可见光到电信波长的宽带光谱响应。
