In this Letter we introduce a novel route for achieving negative-group-velocity waveguiding at deep-subwavelength scales. Our scheme is based on the strong electromagnetic coupling between two conformal surface plasmon structures. Using symmetry arguments and detailed numerical simulations, we show that the coupled system can be geometrically tailored to yield negative-index dispersion. A high ...

We investigate the imaginary parts of the nucleon electromagnetic and axial form factors close to threshold in the framework of heavy baryon chiral perturbation theory. For the isovector electromagnetic form factors, we recover the well known strong enhancement near threshold. For the isoscalar ones, we show that there is no visible enhancement due to the three–pion continuum. This justifies th...

We examine the phenomenon of electromagnetic transparency in semiconductor superlattices having various miniband dispersion laws in the presence of multi-frequency periodic and nonperiodic electric fields. Effects of induced transparency and spontaneous generation of static fields are discussed. We pay special attention to self-induced electromagnetic transparency and its correlation to dynamic...

Heisenberg’s breakthrough to matrix mechanics was directly stimulated by studies of interaction of quantized material systems with electromagnetic radiation which came to a head in the Kramers-Heisenberg paper on dispersion theory in January 1925. In this talk, we will review the important contributions of Kramers, van Vleck, and Born to this subject. Important results from classical physics wi...

Various methods for efficiently solving electromagnetic problems are presented. Electromagnetic scattering problems can be roughly classified into surface and volume problems, while fast methods are either differential or integral equation based. The resultant systems of linear equations are either solved directly or iteratively. A review of various differential equation solvers, their complexi...

The dispersion of the measurement of electromagnetic disturbance above 1 GHz is mainly affected by site imperfections (expressed by SVSWR). To evaluate the uncertainty in electromagnetic disturbance measurements at 1 18 GHz, we measured SVSWR and the field strength at 9 measurement site. From our result, the measured field strength at each measurement site was observed in the range of 2σ that d...

The impedance technique, also known as the particular case of the invariant embedding approach, is generalized for modeling of electromagnetic wave propagation in the anisotropic and gyrotropic media with spatial dispersion such as hot magnetized plasmas. That provides a new way for analytical and numerical studies of “full wave” problems in plasma physics that require exact solutions of Maxwel...

In this paper we proposed novel silicon laser design based on the dispersion engineered photonic crystals. With the unique self-collimation property, we design an optical cavity with a Q factor of 2000. The strong mode confinement in the low index active material offers an opportunity to realize a lasing mechanism. To investigate the lasing dynamics we introduce the rate equations of atomic sys...