A scheme for separating optical precursors from a square-modulated laser pulse through an
asymmetric double Al x Ga 1-x As/GaAs quantum-well structure via resonant tunneling is …

We report the generation of stacked optical precursors from a laser beam whose amplitude
or phase is modulated by sequenced on-off step waveforms. Making use of the constructive …

We study the transient response dynamics of 87 Rb atomic vapor buffered in 8 torr Ne gas
through an electromagnetically induced transparency configured in Λ-scheme …

In our study, we conduct a comprehensive theoretical analysis on the propagation behavior
of a Gaussian pulse through a four-level Λ-type Rubidium atomic medium under room …

A scheme for enhancing precursor pulse by Doppler effect is proposed in a room-
temperature active-Raman-gain medium. Due to abnormal dispersion between two gain …

Electromagnetic wave focusing devices and optical apparatuses including the same are
provided. An electromagnetic wave focusing device may include a plurality of material …

The description of the precursor fields in a single-resonance Lorentz model dielectric is
considered in the singular and weak dispersion limits. The singular dispersion limit is …

Precursors can serve as a bound on the speed of information with dispersive medium. We
propose a method to identify the speed of optical wave fronts using polarization-based …

We report results of both theoretical and experimental studies of optical precursors
generated from a square-modulated probe laser pulse having a finite rise and fall time and …

We experimentally observed optical precursors in optically pumped crystals using
polarization-based interference. By switching the user-programmable medium among the …