Abstract: The behavior of pointlike electric dipole sources enclosed by an axially
uniform, cylindrically symmetric waveguide of omnidirectionally reflecting material is
analyzed. It is found that the emission spectrum of a source inside the waveguide is
strongly modified by features resembling one-dimensional Van Hove singularities in the
photon local density of states (LDOS). Additionally, more than 100% of the power
radiated by a dipole in vacuum can be collected from the waveguide, owing to the overall
enhancment of the LDOS (known as the Purcell effect). The effect of varying the
positions and orientations of electric dipole sources is also studied.