Plasmonic quasicrystals with broadband transmission enhancement

被引：29

作者：

Kasture, Sachin ^{[1
]}

Ravishankar, Ajith P. ^{[1
]}

Yallapragada, V. J. ^{[1
]}

Patil, Raj ^{[1
]}

Valappil, Nikesh V. ^{[1
]}

Mulay, Gajendra ^{[1
]}

Achanta, Venu Gopal ^{[1
]}

机构：

[1] Tata Inst Fundamental Res, DCMPMS, Bombay 400005, Maharashtra, India

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

关键词：

EXTRAORDINARY OPTICAL-TRANSMISSION; SUBWAVELENGTH; RESONANCES; SYMMETRY;

D O I：

10.1038/srep05257

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Plasmonic quasicrystals (PlQCs), by integrating the properties of quasicrystals (rotational symmetry and long range ordering but lack translational symmetry) and surface plasmon polariton mediated effects, offer several advantages over plasmonic crystals (PlCs). For example, in PlQCs one could have broadband, polarization independent response. However, large area patterning by electron beam lithography requires precise lattice coordinates as well as a practical way to design the structures for specific spectral response. We demonstrate design and fabrication of large area quasicrystal air hole patterns of pi/5 symmetry in metal film in which broadband, polarization and launch angle independent transmission enhancement is observed. We demonstrate bi-grating quasicrystals to show that designable transmission response is possible over visible to near infrared wavelength regions with about 15 times enhancement. These would be useful in many applications like energy harvesting, nonlinear optics and quantum plasmonics.

引用

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