  Anderson localization is a ubiquitous interference phenomenon in which waves
fail to propagate in a disordered medium. Unlike in a classical resonator,
satisfying the favorable condition for the interference in a disordered medium
is truly a statistical problem in physics. Recent progress in realizing
Anderson localization is mainly limited to the iterative method for optimizing
the disordered medium. Availability of an in-situ, active control for
optimization surely paves the way of realizing the Anderson localization and
its applications. In this letter, we have proposed an electro-optic
controllable disordered photonic crystal and demonstrated its performance in
terms of Anderson localization of light in situ in real time by application of
an external electric field. We believe that Anderson localization using this
medium is not only expected to address the scientific rigors but also to
introduce an extra degree of freedom i.e., the tunability in its technical
applications.
