Metamaterial Lüneburg lens for Fourier optics on-a-chip

Hamdam Nikkhah; Trevor Hall

doi:10.1117/12.2040220

8 March 2014 Metamaterial Lüneburg lens for Fourier optics on-a-chip

Hamdam Nikkhah, Trevor Hall

Proceedings Volume 8988, Integrated Optics: Devices, Materials, and Technologies XVIII; 89880J (2014) https://doi.org/10.1117/12.2040220
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

A planar metamaterial Lüneburg lens that enables Fourier optics on-a-chip can be implemented in an SOI slab waveguide structure by patterning the silicon core with variable sized holes. The subwavelength patterning of binary nanocomposite material to form the metamaterial offers the major advantage of fabrication by a single etch step while demanding feature sizes that can be accessed by deep UV lithography in addition to e-beam lithography. A numerical calibration procedure is described that is used to find the relation between fill factor and the local homogenised effective refractive index and which improves upon the predictions of analytic effective media theory used by other researchers. The concept and designs were verified by the 2D FDTD simulation of a two lens telescope system with waveguide feeds implemented in a metamaterial that shows a low insertion loss of -0.45 dB with a reliable field profile at exit. A 3D FDTD simulation of the same two lens telescope system that takes full account of the SOI layers, their finite thickness, and the ridge waveguide feeds also predicts a low loss of -0.83 dB. Less reliance however can be placed on this result due to the coarseness of the computational grid that was necessary. Nevertheless both results are encouraging for planned fabrication trials. This structure can be used in optical transpose interconnection systems in optical switching architectures with the advantage of avoiding large number crossover waveguides in optical communication systems.

Citation Download Citation

Hamdam Nikkhah and Trevor Hall "Metamaterial Lüneburg lens for Fourier optics on-a-chip", Proc. SPIE 8988, Integrated Optics: Devices, Materials, and Technologies XVIII, 89880J (8 March 2014); https://doi.org/10.1117/12.2040220

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available