Focus modulation of cylindrical vector beams through negative-index grating lenses
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- 作者：Shengming Wanga ; Ji Xua ; b ; xuji@njupt.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Yi Zhonga ; Rong Rena ; Yunqing Lua ; Hongdan Wana ; Jin Wanga ; Jianping Dingb
- 关键词：Cylindrical vector beams ; Grating lens ; Focus modulation ; Negative refraction index ; Depth of focus
- 刊名：Optics Communications
- 出版年：2016
- 出版时间：1 August 2016
- 年：2016
- 卷：372
- 期：Complete
- 页码：245-249
- 全文大小：2724 K
文摘
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A cylindrically symmetric negative-index grating lens composed of unitary material is proposed as an effective method to modulate the focusing of cylindrical vector beams (CVBs).
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The grating parameters are designed to obtain an appropriate negative index, and the lens profile is tailored to realize the constructive interference.
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The plano-concave lens is parameterized to achieve desired focal length.
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The plano-cone lens is proposed to obtain large depth of focus.
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The presented modulation methods can be applied for any arbitrary polarized CVBs.