Focusing characteristics of light beam passing through birefringent film
The properties of circularly polarized beams tightly focusing through a uniaxial crystal film are investigated by using the angular spectrum method of plane waves. The numerical results show that, for the positive crystal, the focus is closed to lens with the birefringence increasing. However, for the negative crystal, the focus shifts away from the lens and the size of the optical spot increases. With the increasing of the positive and negative crystal thickness, the focus is close to lens. However, the thickness of positive crystal increases the same as the thickness of negative crystal, the focus for the positive crystal film shifts more obviously than that for the negative crystal film. The closer the positive and negative crystal gets, the closer the focus is. When the film shifts rapidly, however, the intensity for the positive crystal film decreases more rapidly than that for the negative crystal film.
birefringent film vector diffraction focal shift
Tianzhen Shi Yaoju Zhang
College of Physics & Electronic Information Engineering, Wenzhou University,Wenzhou 325035, China
国际会议
2011 International Conference on Electronics and Optoelectronics(2011电子学与光电子学国际会议 ICEOE 2011)
大连
英文
1255-1258
2011-07-29（万方平台首次上网日期，不代表论文的发表时间）