Emission from a Slab of Resonant Two-Level Atoms
Induced by a Delta-Pulse Excitation¹

Jamal T. Manassah

Department of Electrical Engineering, City College of New York, New York, NY 10031, USA

e-mail: jmanassah@gmail.com

Received October 2, 2011; in final form, October 10, 2011; published online February 6, 2012

Abstract—Using eigenmode analysis I calculate in the linear regime the emission characteristics from a slab
of two-level resonant atoms excited by a delta-pulse propagating normal to the surface of the slab. I show that
the qualitative features of the emitted spectra in the forward and backward directions to be different from each
other; I also find the effects of the total linewidth of the resonance line and of the deviation in the spatial peri-
odicity of the initial atomic polarization from k₀, where k₀ = ₀/c and ₀ is the two level resonant frequency,
on the spectra. The dominant spatial mode of the system is identified as the key parameter for determining the
forward emission spectral width.

DOI: 10.1134/S1054660X12030139

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