Vacancy of laser field induced by phase reflection in underdense plasmas and its relation to laser-plasma parameters
相位反射产生的激光场空洞现象及其与激光等离子体参数相关性研究

It is shown theoretically and by particle- in-cell simulations that the plasma density modulation produced by laser in underdense pre-plasmas can serve as a Bragg reflector, which results in phase reflection occurring at low-density plasma area. The phase reflection can influence the laser propagating in plasmas, such as the vacancy of laser field induced by two laser pulses counter-propagating in plasmas. It is also shown that the period of phase reflection and the reflectivity are related with the plasma density, thickness, intensity and the duration of laser.