基于高聚物光诱导激子漂白的无腔光学双稳态

基于已建立的高聚物光诱导激子漂白动力学理论，模拟计算了一类基态非简并高聚物在光激发和弛豫过程中的瞬态无腔光学双稳态．结果表明，基于高聚物的超快激发和弛豫，可获得瞬态饱和吸收型和增强吸收型无腔光学双稳态，其开关时间均在ps和fs量级．随着入射探测光脉冲相对入射泵浦光脉冲延迟时间的增加，无腔光学双稳态可由饱和吸收型向增强吸收型转变，转变的快慢与高聚物光诱导漂白的弛豫的快慢成正比 关键词：

MIRRORLESS OPTICAL BISTABILITY DUE TO PHOTOINDUCED EXCITON BLEACHING OF POLYMERS

Based on the established theory of photoinduced exciton bleaching of the polymers with nondegenerated ground state,we calculated the transient mirrorless optical bistability of photoexcitation and relaxation processes in the polymers.The results show that the transient saturation absorption mirrorless optical bistabilities and the increasing absorption mirrorless optical bistabilities can be obtained from the ultrafast excitation and relaxation processes in the polymers with nondegenerate ground state,and the switching time of the optical bistabilities is of the order of fs or ps.With the increase of the delay time of the probe pulse relative to pump pulse,the nature of mirrorless optical bistability can change from the saturation absorption optical bistability to increasing absorption optical bistability,and the rate of change is proportional to the speed of relaxation of the photoinduced exciton.