Controlled Self-Assembly of Organic Microcrystals for Laser Applications
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- 作者：Xiaomei Lu ; Xuedong Wang ; Qing Liao ; Hongbing Fu
- 刊名：Journal of Physical Chemistry C
- 出版年：2015
- 出版时间：September 24, 2015
- 年：2015
- 卷：119
- 期：38
- 页码：22108-22113
- 全文大小：371K
- ISSN：1932-7455
文摘
The small organic molecule p-distyrylbenzene (DSB) has been controllably prepared into one-dimensional microwires (1D-MWs) and 2D rhombic microdisks (2D-RMDs) by modulating the growth kinetics in the process of morphology growth. These as-prepared organic microcrystals, 1D-MWs and 2D-RMDs, exhibit a shape-dependent microcavity effect in that the single 1D-MW can act as a Fabry-P茅rot (FP) mode lasing resonator while the individual 2D-RMD functions as the whispering-gallery-mode (WGM) microcavity. Moreover, as compared with the 1D FP resonators, there exists a higher quality factor (Q) in the WGM lasing resonator under the identical optical path length. Significantly, the lasing threshold, Eth = 1.02 渭J/cm2, of 2D-RMDs is much lower than Eth = 2.57 渭J/cm2 of 1D-MWs. Our demonstration can give the direction for the development of the organic solid-state microlasers.