Optical fabrication and selection of superconductor fine particles in liquid helium

利用调q Nd:YAG激光器在超流氦中对金属靶进行了激光烧蚀，为获得高结晶质量的纳米和微颗粒提供了新的机会。此外，制备的金属纳米粒子在超流氦中成功地进行了光学操作，使得只有较小的颗粒被选择性输送。另一方面，由于迈斯纳效应，我们成功地实现了超导体粒子的磁阱。

Laser ablation of metal targets in superfluid helium was performedwith a Q-switched Nd:YAG laser and provides a novel opportunity to obtain nano- and micro-particles with high crystalline quality . In addition, optical manipulation of fabricated metal nanoparticles was successfully performed in superfluid helium, so that only the smaller particles were selectively transported. On the other hand, we succeeded in the magnetic trap of superconductor particles due to Meissner effect.