Analog computing using graphene-based metalines

被引：135

作者：

AbdollahRamezani, Sajjad ^{[1
]}

Arik, Kamalodin ^{[1
]}

Khavasi, Amin ^{[1
]}

Kavehvash, Zahra ^{[1
]}

机构：

[1] Department of Electrical Engineering, Sharif University of Technology, P.O. Box 11555-4363, Tehran, Iran

来源：

Optics Letters | 2015年 / 40卷 / 22期

关键词：

Signal processing - Incident light - Plasmonics - Fourier transforms;

D O I：

10.1364/OL.40.005239

中图分类号：

学科分类号：

摘要：

We introduce the new concept of metalines for manipulating the amplitude and phase profile of an incident wave locally and independently. Thanks to the highly confined graphene plasmons, a transmit-array of graphene-based metalines is used to realize analog computing on an ultracompact, integrable, and planar platform. By employing the general concepts of spatial Fourier transformation, a well-designed structure of such meta-transmit-array, combined with graded index (GRIN) lenses, can perform two mathematical operations, i.e., differentiation and integration, with high efficiency. The presented configuration is about 60 times shorter than the recent structure proposed by Silva et al. [Science 343, 160 (2014)]; moreover, our simulated output responses are in better agreement with the desired analytical results. These findings may lead to remarkable achievements in light-based plasmonic signal processors at nanoscale, instead of their bulky conventional dielectric lens-based counterparts. © 2015 Optical Society of America.

引用

页码：5239 / 5242