Unexpected Sensitivity of Nitrogen Ions Superradiant Emission on Pump Laser Wavelength and Duration

Yi Liu, Pengji Ding, Neven Ibrakovic, Samuel Bengtsson, Shihua Chen, Rostyslav Danylo, Emma R. Simpson, Esben W. Larsen, Xiang Zhang, Zhengquan Fan, Aurélien Houard, Johan Mauritsson, Anne L'Huillier, Cord L. Arnold, Songlin Zhuang, Vladimir Tikhonchuk, André Mysyrowicz