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Published Online August 28, 2008
Science DOI: 10.1126/science.1162087

Reports

Submitted on June 20, 2008
Accepted on August 20, 2008

Time Reversal and Negative Refraction

J. B. Pendry 1*

1 Department of Physics, The Blackett Laboratory, Imperial College London, London SW7 2AZ, UK

* To whom correspondence should be addressed.
J. B. Pendry , E-mail: j.pendry{at}imperial.ac.uk

Time reversal and negative refraction are shown to be intimately linked processes. A scheme is proposed that exploits transitions between positive and negative frequencies to mimic negative refraction at an interface and hence to make a negatively refracting lens. The theory applies equally to electromagnetic and acoustic waves. An experimental realisation is proposed, and under ideal circumstances this lens can exhibit subwavelength resolution limited only by the strength of the time-reversed signal.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)