On-chip photonic Fourier transform with surface plasmon polaritons

Light, Science & Applications
Shan Shan KouJiao Lin

Abstract

The Fourier transform (FT), a cornerstone of optical processing, enables rapid evaluation of fundamental mathematical operations, such as derivatives and integrals. Conventionally, a converging lens performs an optical FT in free space when light passes through it. The speed of the transformation is limited by the thickness and the focal length of the lens. By using the wave nature of surface plasmon polaritons (SPPs), here we demonstrate that the FT can be implemented in a planar configuration with a minimal propagation distance of around 10 μm, resulting in an increase of speed by four to five orders of magnitude. The photonic FT was tested by synthesizing intricate SPP waves with their Fourier components. The reduced dimensionality in the minuscule device allows the future development of an ultrafast on-chip photonic information processing platform for large-scale optical computing.

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Citations

Nov 15, 2018·Nanoscale·Petr DvořákTomáš Šikola
Jan 26, 2018·Scientific Reports·Jinchao TongDao Hua Zhang
Oct 24, 2017·Scientific Reports·Alexander J MacfadenTimothy D Wilkinson
May 9, 2019·Nanoscale Research Letters·Guoqun LiSen Wang
Mar 14, 2018·Optics Express·Jinchao TongDao Hua Zhang
Jun 6, 2018·Science Advances·Shibiao WeiJiao Lin
Jul 14, 2017·Scientific Reports·Hongchang DengLibo Yuan
Aug 9, 2019·Nature Communications·Zi WangTingyi Gu
Jul 30, 2016·Optics Letters·Amir YoussefiAmin Khavasi
Mar 7, 2019·Light, Science & Applications·Joseph W NelsonNathan C Lindquist
Mar 28, 2021·Optics Express·Ryan M SpiesNathan C Lindquist

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