Numerical Simulation of Lasing Dynamics in Cholesteric Liquid Crystal

Finite-Difference Time-Domain Analysis of Twist-Defect-Mode Lasing Dynamics in Cholesteric Photonic Liquid Crystal

“…The system under investigation might be in the ''transition'' region from right-handed circularly polarized emission to left-handed circularly polarized emission; therefore, we achieved elliptically polarized emission. In contrast to that observed in the bulk CLC, 19) propagating electric fields were obtained even inside the CLC, as shown in Fig. 7(b), which is significantly far from the defect site.…”

“…Recently, we have reported a numerical simulation of lasing dynamics in uniaxial optical anisotropic media with a 1D helix modeling CLC on the basis of the auxiliary differential equation finite-difference time-domain (ADE-FDTD) method. [18][19][20] We have successfully reproduced experimentally observed circularly polarized band-edge lasing. Moreover, we have also discussed that one can obtain threshold pumping rates by plotting emission peak intensity as a function of pumping rate; thus, the ADE-FDTD scheme can be utilized to search for a more efficient device architecture of a CLC laser with a lower lasing threshold.…”

“…These spacial distributions are quite different from those in CLCs without defects. 19) When the thicknesses of CLCs are less than 20 m, the general trends are quite similar in the vicinity of the defect site irrespective of the thickness of the CLC layers. However, when the thickness of CLCs is 26 m, strong enhancements of electric fields are observed not only in defect sites, but also in the bulk.…”

“…18) We have also shown that the underlying physical mechanism of lasing dynamics can be examined by analyzing time-dependent field distributions. 19) Here, we report on the ADE-FDTD-based numerical analysis of lasing dynamics in CLC with a twist defect, which is quite different from that of bulk CLC.…”