The Dicke model describes the dynamics of N identical two-level atoms interacting with a quantized threedimensional electromagnetic (EM) field [1]. Under certain conditions the model predicts that the atoms interact with the quantized EM field collectively, giving rise to the widely studied phenomena of superradiance and subradiance [2, 3]. In free space ideal superradiance and subradiance take place in the so called small sample limit, i.e., when the atoms are so close to each other that one can ignore any effect resulting from their different spatial positions. In this case the atoms are indistinguishable with respect to their emission and absorption properties; hence, the presence of equivalent paths through which the emission process may occur gives rise to fully constructive (superradiance) or destructive (subradiance) interference. Ideal superradiance or subradiance in free space is very difficult to observe in the experiments since it requires that the atoms are placed in a regular pattern within a sample smaller than the wavelength of the EM field they interact with (small sample case). The requirement of a regular pattern is due to the presence of the dipoledipole forces that would otherwise break the symmetry under permutation of any two atoms necessary to observe superradiant-subradiant behavior. Such a regularity can be achieved, e.g., with trapped-ion crystals [4] or atoms in optical lattices [5]. In these systems, however, the separation between the particles is typically larger or on the same order of magnitude than the resonant wavelength (large sample case). In the large sample case, cooperative effects still occur but the subradiant state is not completely decoupled from the dynamics. Indeed, partial subradiance and superradiance have been observed with trapped ions [6].