We have presented the time-integrated characteristics of second harmonic (SH) emission of laser-plasma interactions (J. Appl. Phys., 54 (1983), 4902) and time-resolved characteristics of short pulse (100ps) laser shot...We have presented the time-integrated characteristics of second harmonic (SH) emission of laser-plasma interactions (J. Appl. Phys., 54 (1983), 4902) and time-resolved characteristics of short pulse (100ps) laser shots (Scientia Sinica, Series A, 1984, 8: 475). In this letter we further report some new characteristics of SH emission, especially its cut-off or retarded nature observed in time-resolved measurements in laser-target experiments performed with long pulse (full width~1ns) laser, which are different obviously from that observed in short pulse展开更多
文摘We have presented the time-integrated characteristics of second harmonic (SH) emission of laser-plasma interactions (J. Appl. Phys., 54 (1983), 4902) and time-resolved characteristics of short pulse (100ps) laser shots (Scientia Sinica, Series A, 1984, 8: 475). In this letter we further report some new characteristics of SH emission, especially its cut-off or retarded nature observed in time-resolved measurements in laser-target experiments performed with long pulse (full width~1ns) laser, which are different obviously from that observed in short pulse