  Liquid crystals (LCs) form an extremely rich range of self-assembled
topological structures with artificially or naturally created topological
defects. Some of the main applications of LCs are various optical and photonic
devices, where compared to their solid state counterparts soft photonic systems
are fundamentally different in terms of unique properties such as
self-assembly, self-healing, large tunability, sensitivity to external stimuli
and biocompatibility. Here we show that complex tunable microlasers emitting
structured light can be generated from self-assembled topological LC
superstructures containing topological defects inserted into a thin
Fabry-P\'erot microcavity. The topology and geometry of the LC superstructure
determine the structuring of the emitted light by providing complex three
dimensionally varying optical axis and order parameter singularities, also
affecting the topology of the light polarization. The microlaser can be
switched between modes by an electric field and its wavelength can be tuned
with temperature. The proposed soft matter microlaser approach opens new
direction in soft matter photonics research, where structured light with
specifically tailored intensity and polarization fields could be designed and
implemented.
