  Wave propagation in disordered media can be strongly modified by multiple
scattering and wave interference. Ultimately the so-called Anderson-localized
regime is reached when the waves become strongly confined in space. So far,
Anderson localization of light has been probed in transmission experiments by
measuring the intensity of an external light source after propagation through a
disordered medium. However, discriminating between Anderson localization and
losses in these experiments remains a major challenge. Here we present an
alternative approach where we use quantum emitters embedded in disordered
photonic crystal waveguides as light sources. Anderson-localized modes are
efficiently excited and the analysis of the photoluminescence spectra allows to
explore their statistical properties paving a way for controlling Anderson
localization in disordered photonic crystals.
