Victor Pacheco-Peña

1 month ago | nature.com | Victor Pacheco-Peña |Diego Solis |Brian Edwards

AbstractWe introduce a mechanism that can both hold and amplify electromagnetic waves by rapidly changing the permittivity of the medium during the wave travel from a positive to a dispersionless (i.e. non-Foster) negative value and then back again. The underlying physics behind this phenomenon is theoretically explored by considering plane wave and Gaussian pulse propagation in an unbounded medium.