  Tunable, battery free light emission is demonstrated in a solid state device
that is compatible with lab on a chip technology and easily fabricated via
solution processing techniques. A porous one dimensional (1D) photonic crystal
(also called Bragg stack or mirror) is infiltrated by chemiluminescence
rubrene-based reagents. The Bragg mirror has been designed to have the photonic
band gap overlapping with the emission spectrum of rubrene. The
chemiluminescence reaction occurs in the intrapores of the photonic crystal and
the emission spectrum of the dye is modulated according to the photonic band
gap position. This is a compact, powerless emitting source that can be
exploited in disposable photonic chip for sensing and point of care
applications.
