Negative index of refraction, perfect lenses and transformation optics -- some words of caution

Details Negative index of refraction, perfect lenses and transformation optics -- some words of caution Negative index of refraction, perfect lenses and transformation optics -- some words of caution

2010-01-26

arxiv.org/abs/1001.4655v1

proceedings to "2010 URSI International Symposium on Electromagnetic Theory (EMTS)", p. 760--763

Physics

Optics

13 pages, 3 figures, LaTeX

Scientific paper

10.1109/URSI-EMTS.2010.5637241

In this paper we show that a negative index of refraction is not a direct implication of transformation optics with orientation-reversing diffeomorphisms. Rather a negative index appears due to a specific choice of sign freedom. Furthermore, we point out that the transformation designed lens, which relies on the concept of spacetime folding, does not amplify evanescent modes, in contrast to the Pendry-Veselago lens. Instead, evanescent modes at the image point are produced by a duplicated source and thus no imaging of the near field (perfect lensing) takes place.

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