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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 4 — Feb. 14, 2011
  • pp: 3562–3575

Squeezing and expanding light without reflections via transformation optics

C. García-Meca, M. M. Tung, J. V. Galán, R. Ortuño, F. J. Rodríguez-Fortuño, J. Martí, and A. Martínez  »View Author Affiliations


Optics Express, Vol. 19, Issue 4, pp. 3562-3575 (2011)
http://dx.doi.org/10.1364/OE.19.003562


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Abstract

We study the reflection properties of squeezing devices based on transformation optics. An analytical expression for the angle-dependent reflection coefficient of a generic three-dimensional squeezer is derived. In contrast with previous studies, we find that there exist several conditions that guarantee no reflections so it is possible to build transformation-optics-based reflectionless squeezers. Moreover, it is shown that the design of antireflective coatings for the non-reflectionless case can be reduced to matching the impedance between two dielectrics. We illustrate the potential of these devices by proposing two applications in which a reflectionless squeezer is the key element: an ultra-short perfect coupler for high-index nanophotonic waveguides and a completely flat reflectionless hyperlens. We also apply our theory to the coupling of two metallic waveguides with different cross-section. Finally, we show how the studied devices can be implemented with non-magnetic isotropic materials by using a quasi-conformal mapping technique.

© 2011 OSA

OCIS Codes
(220.3630) Optical design and fabrication : Lenses
(230.0230) Optical devices : Optical devices
(160.3918) Materials : Metamaterials

ToC Category:
Physical Optics

History
Original Manuscript: October 26, 2010
Revised Manuscript: December 30, 2010
Manuscript Accepted: January 3, 2011
Published: February 9, 2011

Citation
C. García-Meca, M. M. Tung, J. V. Galán, R. Ortuño, F. J. Rodríguez-Fortuño, J. Martí, and A. Martínez, "Squeezing and expanding light without reflections via transformation optics," Opt. Express 19, 3562-3575 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-4-3562


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