In this presentation, I report on the self-organized photonic crystals (PCs) of organic and polymer materials for laser
applications. Here the self-organized PCs correspond to chiral liquid crystals (CLCs) and colloidal crystals (CCs). First,
CLC molecules self-organize the supramolecular helical arrangement by the helical twisting power like as 1-D PC
structure. When the fluorescent dye-doped CLC is optically excited with a linearly polarized beam, the laser emission
appears at the photonic band gap (PBG) edge(s) of CLC hosts. The optically excited laser emission shows circularly
polarized characteristic, even though the excitation beam is linearly polarized. Applying voltages to the optically excited
CLC cells enables reversible switching of the laser action as a result of changes in the supramolecular helical structure of
CLC host. Moreover, we succeed in the phototunable laser emission by using photoreactive CLCs. Second research
topic is establishment of new potential utilities of CC structures of polymer micro-particles. Monodispersed micro-particles
have an intrinsic capability to self-assemble the face-centered cubic lattice structures like as 3-D PCs on
substrates from the suspension solutions. The highly ordered architectures of colloidal particles are called as the CCs.
The laser cavity structure consists of an intermediate light-emitting layer of a fluorescent dye sandwiched between a pair
of polymeric CC films. Optical excitation of the device gives rise to the laser oscillation within the photonic band-gap of
the CC films. Interestingly, the laser action can be generated by optical excitation even though the CC laser device of
all-polymer materials becomes bent shape by mechanical stress.