Kim Kyung Taec, Kang Kyung Sik, Park Mi Na, Imran Tayyab, Umesh G, Nam Chang Hee
Department of Physics and Coherent X-Ray Research Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea.
Phys Rev Lett. 2007 Nov 30;99(22):223904. doi: 10.1103/PhysRevLett.99.223904. Epub 2007 Nov 29.
Self-compression of attosecond high-order harmonic pulses in the harmonic generation medium itself has been demonstrated. The attosecond pulses were generated in an argon-filled gas cell and compressed by exploiting the dispersion characteristics of argon. Since the harmonic generation medium itself was used as the compression medium, continuous chirp control was easily achieved by adjusting the gas pressure. The optimized attosecond pulse was also the most intense, and its duration of 206 as was very close to the transform-limited value of 200 as.
阿秒高阶谐波脉冲在谐波产生介质自身中的自压缩已得到证实。阿秒脉冲在充满氩气的气室中产生，并利用氩气的色散特性进行压缩。由于谐波产生介质自身被用作压缩介质，通过调节气压可轻松实现连续的啁啾控制。优化后的阿秒脉冲也是最强的，其持续时间为206阿秒，非常接近200阿秒的变换极限值。
