For a general complex scattering potential defined on a real line, we show that the equations
governing invisibility of the potential are invariant under the combined action of parity and …

Propagation of light through a medium with a complex refractive index in which gain and
loss are engineered to be PT symmetric has many remarkable features. In particular the …

We analyze the optical properties of one-dimensional PT-symmetric structures of arbitrary
complexity. These structures violate normal unitarity (photon flux conservation) but are …

Using a scattering matrix formalism, we derive the general scattering properties of optical
structures that are symmetric under a combination of parity and time reversal (PT). We …

Parity-time (PT) symmetric periodic structures, near the spontaneous PT-symmetry breaking
point, can act as unidirectional invisible media. In this regime, the reflection from one end is …

Generally, when imaginary part of an optical potential is non-symmetric the reflectivity, R (E),
shows left/right handedness, further if it is not negative-definite the reflection and …

The scattering of electromagnetic waves lies at the heart of most experimental techniques
over nearly the entire electromagnetic spectrum, ranging from radio waves to optics and x …

We extend the generalized conservation law of light propagating in a one-dimensional PT-
symmetric system, ie,| T− 1|= RLRR for the transmittance T and the reflectance RL, R from …

Recently, unidirectional invisibility has been demonstrated in parity-time (PT) symmetric
periodic structures and has attracted great attention. Nevertheless, fabrication of a complex …

We investigate experimentally parity-time (PT) symmetric scattering using LRC circuits in an
inductively coupled PT-symmetric pair connected to transmission line leads. In the single …