Nanostructured GRIN microlenses for Gaussian beam focusing

被引：26

作者：

Nowosielski, Jedrzej M. ^{[1
,2
]}

Buczynski, Ryszard ^{[1
,2
]}

Hudelist, Florian ^{[1
]}

Waddie, Andrew J. ^{[1
]}

Taghizadeh, Mohammad R. ^{[1
]}

机构：

[1] Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland

[2] Univ Warsaw, Fac Phys, PL-02093 Warsaw, Poland

来源：

OPTICS COMMUNICATIONS | 2010年 / 283卷 / 09期

关键词：

GRIN lenses; Nanostructured media; Gaussian beam propagation; Effective medium theory; ROD LENSES; SYSTEMS;

D O I：

10.1016/j.optcom.2009.12.047

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Gaussian beam propagation through a novel high refractive index contrast nanostructured Gradient-Index (GRIN) microlens with an arbitrary refractive index distribution is investigated. The concept of the nanostructured GRIN microlenses is based on the effective medium theory and we show numerically, using the FDTD method, that nanostructured GRIN microlenses can focus Gaussian beams in an identical manner to conventional GRIN microlenses, Nanostructured GRIN microlenses have a reduced thickness by almost two orders of magnitude compared to conventional GRIN lenses. We also investigate the accuracy of the standard scalar and paraxial GRIN theory in the case of a very high contrast nanostructured GRIN microlens. The paraxial GRIN lens theory is shown only to give an approximate description of Gaussian beam propagation in such a high contrast nanostructured GRIN microlens. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1938 / 1944

页数：7

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