Smallest focal spots

被引:100
作者
Grosjean, T. [1 ]
Courjon, D. [1 ]
机构
[1] Univ Franche Comte, UMR CNRS 6174, Inst FEMTO ST, Dept Opt PM Duffieux, F-25030 Besancon, France
关键词
radial polarization; circular polarization; Bessel beams; conical optics; high index of refraction; superresolution; focusing optimization; nano-optics; near field optics; virtual tip;
D O I
10.1016/j.optcom.2006.11.043
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
It is commonly admitted that radial polarization leads to the best light beam focalisation in terms of spot size. The work presented here shows that the choice of polarization is in fact more subtle. As an example, it is pointed out that, for numerical apertures of focusing systems below 0.8, circular polarization induces the best light confinements in air, whereas for numerical apertures beyond 0.8, radial polarization seems to be the right solution. Moreover, for numerical apertures larger than 1, we propose an original solution to achieve the ultimate focal spots in linear optical regime. They are estimated to 0.36 lambda/NA (lambda is the wavelength and NA is the numerical aperture), the current technological limit being around 65 nm. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:314 / 319
页数:6
相关论文
共 30 条
[11]   Smallest focal hole [J].
Helseth, LE .
OPTICS COMMUNICATIONS, 2006, 257 (01) :1-8
[12]   Optical vortices in focal regions [J].
Helseth, LE .
OPTICS COMMUNICATIONS, 2004, 229 (1-6) :85-91
[13]   Roles of polarization, phase and amplitude in solid immersion lens systems [J].
Helseth, LE .
OPTICS COMMUNICATIONS, 2001, 191 (3-6) :161-172
[14]   Near-field phase change optical recording using a GaP hemispherical lens [J].
Hirota, K ;
Milster, TD ;
Shimura, K ;
Zhang, Y ;
Jo, JS .
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 2000, 39 (2B) :968-972
[15]   Superresolution in far-field imaging [J].
Leiserson, I ;
Lipson, SG ;
Sarafis, V .
OPTICS LETTERS, 2000, 25 (04) :209-211
[16]   SOLID IMMERSION MICROSCOPE [J].
MANSFIELD, SM ;
KINO, GS .
APPLIED PHYSICS LETTERS, 1990, 57 (24) :2615-2616
[17]   Three-dimensional superresolution by annular binary filters [J].
Martínez-Corral, M ;
Andrés, P ;
Zapata-Rodríguez, CJ ;
Kowalczyk, M .
OPTICS COMMUNICATIONS, 1999, 165 (4-6) :267-278
[18]  
Milster TD, 2005, OPT PHOTONICS NEWS, V16, P28, DOI 10.1364/OPN.16.3.000028
[19]   A VECTOR WAVE ANALYSIS OF A BESSEL BEAM [J].
MISHRA, SR .
OPTICS COMMUNICATIONS, 1991, 85 (2-3) :159-161
[20]   Optimized pupil-plane filters for confocal microscope point-spread function engineering [J].
Neil, MAA ;
Juskaitis, R ;
Wilson, T ;
Laczik, ZJ ;
Sarafis, V .
OPTICS LETTERS, 2000, 25 (04) :245-247