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Abstract
We present a stand-alone beam-focusing flat lens for use in the telecommunications wavelength range. Light incident on the back surface of the lens propagates through a subwavelength aperture and is heavily diffracted on exit and partially couples into a surface plasmon polariton and a surface wave propagating along the surface of the lens. Interference between the diffracted wave and re-emission from a grating patterned on the surface produces a highly collimated beam. We show for the first time a geometry at which a lens of this type can be used at telecommunication wavelengths (lambda = 1.55 mu m) and identify the light coupling and re-emission mechanisms involved. Measured beam profile results at varying incident wavelengths show excellent agreement with Lumerical FDTD simulation results. (C) 2014 Optical Society of America
Original language | English |
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Pages (from-to) | 3786-3789 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 39 |
Issue number | 13 |
DOIs | |
Publication status | Published - 1 Jul 2014 |
Structured keywords
- QETLabs
Keywords
- LASERS
- LIGHT
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Dive into the research topics of 'Slot-grating flat lens for telecom wavelengths'. Together they form a unique fingerprint.Projects
- 1 Finished
Profiles
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Professor Martin J Cryan
- Department of Electrical & Electronic Engineering - Professor of Applied Electromagnetics and Photonics
- Cabot Institute for the Environment
- The Bristol Centre for Nanoscience and Quantum Information
- Photonics
- Communication Systems and Networks
Person: Academic , Member