Cloaking apertureless near-field scanning optical microscopy tips

被引:42
作者
Bilotti, Filiberto [1 ]
Tricarico, Simone [1 ]
Pierini, Francesco [1 ]
Vegni, Lucio [1 ]
机构
[1] Roma Tre Univ, I-00146 Rome, Italy
关键词
D O I
10.1364/OL.36.000211
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We numerically demonstrate that properly designed plasmonic covers can be used to enhance the performance of near-field scanning optical microscopy (NSOM) systems based on the employment of apertureless metallic tip probes. The covering material, exhibiting a near-zero value of the real permittivity at the working frequency, is designed in such a way to dramatically reduce the undesired scattering due to the strongly plasmonic behavior of the tip. Though the light scattering by the tip end is necessary for the correct operation of NSOMs, the additional scattering due to the whole probe affects the signal-to-noise ratio and thus the resolution of the acquired image. By covering the whole probe but not the very tip, we show that unwanted scattering can be effectively reduced. A realistic setup, working at mid-IR frequencies and employing silicon carbide covers, has been designed and simulated to confirm the effectiveness of the proposed approach. (C) 2011 Optical Society of America
引用
收藏
页码:211 / 213
页数:3
相关论文
共 18 条
[1]   Achieving transparency with plasmonic and metamaterial coatings -: art. no. 016623 [J].
Alù, A ;
Engheta, N .
PHYSICAL REVIEW E, 2005, 72 (01)
[2]   Cloaking a Sensor [J].
Alu, Andrea ;
Engheta, Nader .
PHYSICAL REVIEW LETTERS, 2009, 102 (23)
[3]   Plasmonic Metamaterial Cloaking at Optical Frequencies [J].
Bilotti, Filiberto ;
Tricarico, Simone ;
Vegni, Lucio .
IEEE TRANSACTIONS ON NANOTECHNOLOGY, 2010, 9 (01) :55-61
[4]   Optical cloaking with metamaterials [J].
Cai, Wenshan ;
Chettiar, Uday K. ;
Kildishev, Alexander V. ;
Shalaev, Vladimir M. .
NATURE PHOTONICS, 2007, 1 (04) :224-227
[5]  
CST Studio Suite, 2009, CST STUD SUIT 2009
[6]   Near-field scanning optical microscopy [J].
Dunn, RC .
CHEMICAL REVIEWS, 1999, 99 (10) :2891-+
[7]   OPTICAL CONSTANTS OF NOBLE METALS [J].
JOHNSON, PB ;
CHRISTY, RW .
PHYSICAL REVIEW B, 1972, 6 (12) :4370-4379
[8]   On the cloaking effects associated with anomalous localized resonance [J].
Milton, Graeme W. ;
Nicorovici, Nicolae-Alexandru P. .
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2006, 462 (2074) :3027-3059
[9]  
Palik E. D., 1998, HDB OPTICAL CONSTANT, VII
[10]   Controlling electromagnetic fields [J].
Pendry, J. B. ;
Schurig, D. ;
Smith, D. R. .
SCIENCE, 2006, 312 (5781) :1780-1782