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Comment on “Do evanescent waves really exist in free space?” |
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| Authors: | Colin JR Sheppard Miguel A Alonso Riccardo Borghi |
| Institution: | a Division of Bioengineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore b Department of Diagnostic Radiology, National University of Singapore, 5 Lower Kent Ridge Road, Singapore 119074, Singapore c The Institute of Optics, University of Rochester, Rochester, NY 14627, USA d Dipartimento di Fisica, Università Roma Tre, and CNR - INFM, Via della Vasca Navale 84, I-00146 Rome, Italy e Dipartimento di Elettronica Applicata, Università Roma Tre, and CNR - INFM, Via della Vasca Navale 84, I-00146 Rome, Italy |
| Abstract: | In a recent paper A.B. Katrich, Opt. Commun. 255 (2005) 169], Katrich has claimed that in a 2D free space evanescent waves do not exist because they are not exact solutions of the free space wave equation. We show that his conclusions are not valid, and that evanescent can indeed exist in free space. |
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