In this work we discuss two recent experiments in the frequency- and time-domain for electromagnetic waves tunneling through an optical multilayer also known as 1DPC. These experiments are intended to demonstrate measurability and hence the physical reality of the superluminal (exceeding the speed of light in vacuum) group velocities for evanescent modes. Despite these anomalous velocities, Einstein causality is not violated since the front (Sommerfeld forerunner) remains luminal.
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© 2000 American Institute of Physics.
2000
American Institute of Physics
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