Pneumatically Tunable Droplet Microlaser
Pneumatically Tunable Droplet Microlaser
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气动可调谐液滴微型激光器
DOI：
10.1002/lpor.202200874
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发表时间：
2023
影响因子：
11
通讯作者：
Yamamoto Yohei
中科院分区：
文献类型：
--
作者：
Yamagishi Hiroshi;Fujita Keitaro;Miyagawa Junnosuke;Mikami Yuya;Yoshioka Hiroaki;Oki Yuji;Takada Naoki;Baba Soumei;Saito Shimpei;Someya Satoshi;Lin Zhan‐Hong;Huang Jer‐Shing;Yamamoto Yohei
理想的柔性激光器可以与自然界中的微小波动协调一致地起作用。完全由液体制成的激光器在这方面很有前途，但它们本质上不稳定，并且不适用于在环境条件下稳定运行，除非将它们封装在定制的容器或基质中以防止液体蒸发。在这里，报道了一种简单的方法来形成一个自立的球形微激光器，该激光器完全由液体组成，即使在大气中也能稳定运行。通过使用离子液体作为液体介质并将液滴轻轻地浇铸在覆盖有疏水纳米颗粒的基底上以增强接触角的亚稳性来实现液滴的稳健性和球形形态。由此产生的液滴非常坚固，可作为高效的长效激光振荡器。当液滴受到微弱微风或湿气时，激光波长敏感地偏移，这与液滴的变形相关联。空气动力学和电磁模拟一致支持的气体对流下的液滴的形态和光学响应。液滴很容易用喷墨打印机缩放，而不需要任何进一步的处理。
An ideally flexible laser may function in unison with minute fluctuations in nature. Lasers made solely from liquids are promising toward this end, but they are intrinsically unstable and have been inapplicable to steady operation under ambient conditions unless they are enclosed in a tailored container or a matrix to prevent the evaporation of the liquid. Here, a simple methodology is reported to form a self‐standing spherical microlaser that is composed fully of liquid and operates steadily even under atmosphere. The robustness and spherical morphology of the droplets are achieved by using ionic liquid as the liquid medium and gently casting the droplets on a substrate covered with hydrophobic nanoparticles to enhance the metastability of the contact angle. The resulting droplets are highly robust and work as efficient long‐lasting laser oscillators. The lasing wavelength is sensitively shifted when the droplets are subjected to a faint breeze or moisture, which is associated with the deformation of the droplet. The morphological and optical responses of the droplet under gas convection are consistently supported by aerodynamic and electromagnetic simulations. The droplets are readily scalable with an inkjet printer without the need for any further treatments.