  We demonstrate an on demand spatial control of excitonic magnetic lattices
for the potential applications of excitonic-based quantum optical devices. A
two dimensional magnetic lattice of indirect excitons can form a transition to
one dimensional lattice configuration under the influence of external magnetic
bias fields. The transition is identified by measuring the spatial distribution
of two dimensional photoluminance for several values of the external magnetic
bias fields. The number of the trapped excitons is found to increase between
sites along a perpendicular direction exhibiting two to one dimensional lattice
transition. This work may apply for various controllable quantum simulations,
such as superfluid-Mott-insulators, in quantum optical devices.
