Mirrorless Lasing in a Dye-Doped Ferroelectric Liquid Crystal

Lasing From a Förster Transfer Fluorescent Dye Couple Dissolved in a Chiral Nematic Liquid Crystal

“…[11±15] Dye-doped chiral smectic (SmC*) liquid crystals were also found to display mirrorless lasing. [16] To exploit the general advantages of Förster couple lasing systems, as outlined above, for mirrorless dye-doped CNLC lasers, we have recently studied a Coumarin sensitizer/Pyrromethene emitter Förster transfer dye couple dissolved in a CNLC, and reported on its photophysics under low excitation densities. [13] Here, we present the lasing properties of the CNLC/Förster couple system previously described.…”

Formation of periodic domains and change in physical properties of paramagnetic copper doped ZnO nanoparticle dispersed ferroelectric liquid crystal system

“…FLCs have also proven their potential applicability in the tunable laser, diffraction grating, ionic impurity free memory devices, etc. [8][9][10].…”

One-dimensional birefringent photonic crystal laser

“…[3][4][5][6][7][8] Of these proposed applications, it is particularly interesting to study a lasing at the PBG band because the group velocity of the photon approaches zero and thus a low-threshold laser is expected and conducted by using three-, 9,10 two-, [11][12][13] and one-dimensional ͑1D͒ PBGs. [14][15][16][17][18][19][20][21][22][23][24][25] Among them, one of the simplest is a lasing from 1D PC lasers. Although 1D PCs do not form complete threedimensional PBGs, 1D photonic lasers are easy to make and, hence, potentially inexpensive; further, they have many applications.…”

“…Although 1D PCs do not form complete threedimensional PBGs, 1D photonic lasers are easy to make and, hence, potentially inexpensive; further, they have many applications. Thus, various studies on lasing with 1D PCs have been reported: photonic band edge lasers, [14][15][16][17] 1D PCs containing nematic liquid crystals ͑LCs͒, 18,19 and 1D PCs that allow the wavelength of the laser light can be tuned. 19,20 More recently, it has been suggested that in order to achieve high lasing efficiency, reflection mirrors 21,22 or defects [23][24][25] in cholesteric LCs should be introduced as a new type of device structure in 1D PC lasers.…”