Aligned carbon nanotubes as polarization-sensitive, molecular near-field detectors

被引:33
作者
Cubukcu, Ertugrul [1 ]
Degirmenci, Fatih [1 ]
Kocabas, Coskun [3 ]
Zimmler, Mariano A. [1 ]
Rogers, John A. [2 ]
Capasso, Federico [1 ]
机构
[1] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA
[2] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
[3] Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA
关键词
optical antenna; plasmonics; ENHANCED RAMAN-SCATTERING; OPTICAL-PROPERTIES; SINGLE-MOLECULE; GUIDED GROWTH; ARRAYS; NANOPARTICLES; EMISSION;
D O I
10.1073/pnas.0812217106
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
Near-field scanning optical microscopes are widely used in imaging of subwavelength features in various material systems and nanostructures. For a variety of applications, polarization-sensitive near-field probes can provide valuable information on the nature and symmetry of the imaged nanoparticles and emitters. Conventional near-field optical microscopy lacks in-plane polarization sensitivity. Here, we use aligned single-wall carbon nanotubes as polarization-sensitive molecular scale probes to image the transverse near-field components of an optical Hertzian dipole antenna. Because of the Raman "antenna effect" in carbon nanotubes, only the near-field components along the nanotube axis are detected. These findings demonstrate that aligned carbon nanotubes can be used as polarization-sensitive near-field detectors.
引用
收藏
页码:2495 / 2499
页数:5
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