Creation of metallic state high-pressure phase of Si using femtosecond laser-driven nano-shock

本研究的目的是利用飞秒激光驱动的纳米激波诱导和淬灭Si的金属态高压相，并利用飞秒激光对Si进行辐照制备金属态Si。Si的高压相仅在压力下存在，在压力释放后不存在，这是由于常规方法使Si的相转变为原始金刚石相和亚稳相。我们首次成功地利用飞秒激光驱动激波在常压下淬灭了Si的高压相。

The purpose of this study is to induce and quench the metallic state high-pressure phase of Si using femtosecond laser-driven nano shock and to create the metallic Si using only the femtosecond laser irradiation to Si. The high-pressure phase of Si exists only under pressure and does not remain after the pressure release due to the phase transitions to the original diamond phase and metastable phase using conventional methods. We succeeded for the first time in quenching the high-pressure phase of Si under atmospheric pressure using the femtosecond laser-driven shock wave.