Saito Mitsunori, Hashimoto Takuya, Taniguchi Jumpei
Opt Lett. 2017 Oct 15;42(20):4119-4122. doi: 10.1364/OL.42.004119.
Disk resonators are difficult to create with droplets, since they self-form spheres due to the surface tension. In this study, disk (cylindrical) droplets were created by enclosing a dye (rhodamine 6G) solution in silicone rubber. Lasing actions of these droplets were examined by pulsed green laser excitation. In a large droplet (2 mm diameter), the whispering gallery mode emission was difficult to attain, since it competed with the radial or axial modes that made a round trip in the droplet. A disk droplet of 150 μm diameter exhibited a comb-like spectrum of the whispering gallery mode resonant emission.
盘状谐振器很难用液滴来制造，因为由于表面张力它们会自行形成球体。在本研究中，通过将染料（罗丹明6G）溶液封装在硅橡胶中来制造盘状（圆柱形）液滴。通过脉冲绿色激光激发来研究这些液滴的激光作用。在大液滴（直径2毫米）中，很难实现回音壁模式发射，因为它与在液滴中往返传播的径向或轴向模式相互竞争。直径为150微米的盘状液滴表现出回音壁模式共振发射的梳状光谱。
