TY - JOUR
T1 - Accurate description of Gaussian laser beams and electron dynamics
AU - Cao, N.
AU - Ho, Y. K.
AU - Kong, Q.
AU - Wang, P. X.
AU - Yuan, X. Q.
AU - Nishida, Yasushi
AU - Yugami, Noboru
AU - Ito, H.
N1 - Funding Information:
This work is partly supported by the National Natural Science Foundation of China under Contracts No. 19984001 and No. 10076002, National High-Tech ICP Committee in China, Engineering–Physics Research Institute Foundation of China under contract No. 10076002, National Key Basic Research Special Foundation (NKBRF) under grant No. 1999075200, and Zhonglu–Bohr fellowship. The authors would like to thank C.M. Fou for carefully reading and amending of the manuscript as well as A.M. Sessler and E. Eserey for helpful discussions.
PY - 2002/4/1
Y1 - 2002/4/1
N2 - In this paper, the higher order corrections to the description of a Gaussian laser field are derived and expressed as power functions of the parameter s = 1/kw0, where k is the laser wave number and w0 the beam width at the focus center. Using the test particle simulation programs, the electron dynamics obtained using the paraxial approximation, the fifth-order correction, and the seventh-order correction are compared. Special attention is given to electron acceleration in vacuum by intense laser beams. The results reveal that, when kw0 ≳ 50, the paraxial approximation field is good enough to reproduce all the electron dynamic characteristics. In the range of 40 ≲ kw0 < 50, the fifth-order corrected field should be used. For very tightly focused laser beams kw0 ≲ 30, one has to utilize seventh-order or higher order corrections to describe more accurately the field of a Gaussian beam.
AB - In this paper, the higher order corrections to the description of a Gaussian laser field are derived and expressed as power functions of the parameter s = 1/kw0, where k is the laser wave number and w0 the beam width at the focus center. Using the test particle simulation programs, the electron dynamics obtained using the paraxial approximation, the fifth-order correction, and the seventh-order correction are compared. Special attention is given to electron acceleration in vacuum by intense laser beams. The results reveal that, when kw0 ≳ 50, the paraxial approximation field is good enough to reproduce all the electron dynamic characteristics. In the range of 40 ≲ kw0 < 50, the fifth-order corrected field should be used. For very tightly focused laser beams kw0 ≲ 30, one has to utilize seventh-order or higher order corrections to describe more accurately the field of a Gaussian beam.
UR - http://www.scopus.com/inward/record.url?scp=0036535229&partnerID=8YFLogxK
U2 - 10.1016/S0030-4018(02)01196-3
DO - 10.1016/S0030-4018(02)01196-3
M3 - 学術論文
AN - SCOPUS:0036535229
SN - 0030-4018
VL - 204
SP - 7
EP - 15
JO - Optics Communications
JF - Optics Communications
IS - 1-6
ER -