In the mid-19th century, Bernhard Riemann conceived of a new way to think about mathematical spaces, providing the foundation ...

Abstract: This work aims at investigating a parity time-reversal duality (PTD) symmetric bifilar-line waveguide structure constituted by a pair of two parallel-plate waveguides with complementary ...

Department of Chemistry, University of Warwick, CoventryCV4 7AL, U.K. Centre for Diamond Science and Technology, University of Warwick, CoventryCV4 7AL, U.K.