Abstract

In this Letter, we realize the concept of analog computing using an engineered gradient dielectric meta-reflect-array. The proposed configuration consists of individual subwavelength silicon nanobricks, in combination with a fused silica spacer and silver ground plane, realizing a reflection beam with full phase coverage of 2π degrees, as well as an amplitude range of 0 to 1. Spectrally overlapping electric and magnetic dipole resonances, such high-index dielectric metasurfaces can locally and independently manipulate the amplitude and phase of the incident electromagnetic wave. This practically feasible structure overcomes substantial limitations imposed by plasmonic metasurfaces such as absorption losses and low polarization conversion efficiency in the visible range. Using such CMOS-compatible and easily integrable platforms promises highly efficient ultrathin planar wave-based computing systems that circumvent the drawbacks of conventional bulky lens-based signal processors. Based on these key properties and the general concept of spatial Fourier transformation, we design and realize broadband mathematical operators such as the differentiator and integrator in the telecommunication wavelengths.

© 2016 Optical Society of America

Full Article  |  PDF Article
More Like This
Analog computing using graphene-based metalines

Sajjad AbdollahRamezani, Kamalodin Arik, Amin Khavasi, and Zahra Kavehvash
Opt. Lett. 40(22) 5239-5242 (2015)

Analog computing by Brewster effect

Amir Youssefi, Farzad Zangeneh-Nejad, Sajjad Abdollahramezani, and Amin Khavasi
Opt. Lett. 41(15) 3467-3470 (2016)

Optical analog computing of spatial differentiation and edge detection with dielectric metasurfaces

Lei Wan, Danping Pan, Shuaifeng Yang, Wei Zhang, Alexander A. Potapov, Xia Wu, Weiping Liu, Tianhua Feng, and Zhaohui Li
Opt. Lett. 45(7) 2070-2073 (2020)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics