Precise detection of circular dichroism in a cluster of nano-helices by photoacoustic measurements

被引：27

作者：

Benedetti, Alessio ^{[1
,2
]}

Alam, Badrul ^{[1
,2
]}

Esposito, Marco ^{[3
,4
]}

Tasco, Vittorianna ^{[3
]}

Leahu, Grigore ^{[1
]}

Belardin, Alessandro ^{[1
]}

Voti, Roberto Li ^{[1
]}

Passaseo, Adriana ^{[3
]}

Sibilia, Concita ^{[1
,3
]}

机构：

[1] Sapienza Univ Roma, Phys Sect, SBAI Dept, Via A Scarpa14-16, I-00161 Rome, Italy

[2] Sapienza Univ Roma, DIET Dept, Via Eudossiana 18, I-00184 Rome, Italy

[3] CNR Nanotec, Ist Nanotecnol, Polo Nanotecnol, Campus Ecotekne,Via Monteroni, I-73100 Lecce, Italy

[4] Univ Salento, Dip Mat Fis Ennio De Giorgi, Via Arnesano, I-73100 Lecce, Italy

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

关键词：

METAMATERIAL; METASURFACES; RANGE;

D O I：

10.1038/s41598-017-05193-4

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：

Compact samples of nano-helices built by means of a focused ion beam technology with large bandwidth and high dichroism for circular polarization are promising for the construction of built-in-chip sensors, where the ideal transducer must be sufficiently confined without compromising its filtering ability. Direct all-optical measurements revealed the sample's dichroic character with insufficient details because of scattering and diffraction interference. On the other hand, photoacoustic measurements resulted to be a possible alternative investigation, since they directly deal with absorbed power and allow to get clear evidences of the differential selection for the two opposite polarization states. Multilevel numerical simulations confirmed the experimental results, proving once again the reliability of photoacoustic technique and the versatility of this class of dichroic artificial materials.

引用

页数：7

共 37 条

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[Anonymous], 2003, Introduction to Complex Mediums for Optics and Electromagnetics, DOI DOI 10.1117/3.504610

[2]

Balanis C. A., 2005, Antenna Theory: Analysis and Design, V3rd

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