Phys. Rev. A 61, 055802 (2000) We investigate the transient response of a $\Lambda$-type system with one
transition decaying to a modified radiation reservoir with an inverse
square-root singular ...density of modes at threshold, under conditions of
transparency. We calculate the time evolution of the linear susceptibility for
the probe laser field and show that, depending on the strength of the coupling
to the modified vacuum and the background decay, the probe transmission can
exhibit behaviour ranging from underdamped to overdamped oscillations.
Transient gain without population inversion is also possible depending on the
system's parameters.
Opt.Commun. 172 (1999) 229 We study two distinct multi-level atomic models in which one transition is
coupled to a Markovian reservoir, while another linked transition is coupled to
a non-Markovian ...reservoir. We show that by choosing appropriately the density
of modes of the non-Markovian reservoir the spontaneous emission to the
Markovian reservoir is greatly altered. The existence of `dark lines' in the
spontaneous emission spectrum in the Markovian reservoir due to the coupling to
specific density of modes of the non-Markovian reservoir is also predicted.
We study the spontaneous emission, the absorption and dispersion properties of a \({\bf \Lambda}\)-type atom where one transition interacts near resonantly with a double-band photonic crystal. ...Assuming an isotropic dispersion relation near the band edges, we show that two distinct coherent phenomena can occur. First, the spontaneous emission spectrum of the adjacent free space transition obtains `dark lines' (zeroes in the spectrum). Second, the atom can become transparent to a probe laser field coupling to the adjacent free space transition.
We investigate the transient response of a \(\Lambda\)-type system with one transition decaying to a modified radiation reservoir with an inverse square-root singular density of modes at threshold, ...under conditions of transparency. We calculate the time evolution of the linear susceptibility for the probe laser field and show that, depending on the strength of the coupling to the modified vacuum and the background decay, the probe transmission can exhibit behaviour ranging from underdamped to overdamped oscillations. Transient gain without population inversion is also possible depending on the system's parameters.
We study two distinct multi-level atomic models in which one transition is coupled to a Markovian reservoir, while another linked transition is coupled to a non-Markovian reservoir. We show that by ...choosing appropriately the density of modes of the non-Markovian reservoir the spontaneous emission to the Markovian reservoir is greatly altered. The existence of `dark lines' in the spontaneous emission spectrum in the Markovian reservoir due to the coupling to specific density of modes of the non-Markovian reservoir is also predicted.
