Abstract

We study theoretically the propagation of a transient electromagnetic pulse in an unbounded homogeneous, isotropic, reciprocal, chiral medium, using the standard Fourier transform technique. We assume linear, causal, dispersive chiral media with single-resonance dispersion. For the permittivity and permeability functions a single-resonance Lorentz model is assumed, and for the chirality admittance function a single-resonance model consistent with Condon’s model of optical activity is used. Propagation of a TEM plane wave of a step sinusoidal signal is considered. We analyze the transient behavior of the electric-field components at a distant location and at various times of observation. In particular the role of the chirality of the medium and its effects on the dynamical evolution of the transient pulse in such a medium are highlighted, and the similarities and the differences between the transient signal propagation in chiral and nonchiral dispersive media are investigated. We show that several novel phenomena result from the presence of chirality in the medium. Among them are the development of a cross-polarized component, the splitting of instantaneous frequency (which suggests that there are effectively two first precursors and two second precursors for each field component of the transient pulse), and the buildup of the main signal in two stages. Other notable effects are also discussed. Physical insights into these results are provided.

© 1993 Optical Society of America

Full Article  |  PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (52)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription