Infrared phononic nanoantennas: Localized surface phonon polaritons in SiC disks

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• 作者：Mohamed Ameen (1)
  Aitzol Garcia-Etxarri (2)
  Martin Schnell (3)
  Rainer Hillenbrand (3) (4)
  Javier Aizpurua (2)
  
• 关键词：surface phonon polaritons ; infrared nanoantennas ; polar materials ; scattering calculations ; scanning IR near ; field microscopy
• 刊名：Chinese Science Bulletin
• 出版年：2010
• 出版时间：August 2010
• 年：2010
• 卷：55
• 期：24
• 页码：2625-2628
• 全文大小：600KB
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• 作者单位：Mohamed Ameen (1)
  Aitzol Garcia-Etxarri (2)
  Martin Schnell (3)
  Rainer Hillenbrand (3) (4)
  Javier Aizpurua (2)
  
  1. Department of Materials Physics, University of the Basque Country UPV/EHU, Donostia-San Sebasti谩n, 20018, Spain
  2. Centro Mixto de F铆sica de Materiales CSIC-UPV/EHU and Donostia International Physics Centre, San Sebastian, 20018, Spain
  3. Nanooptics Group, CIC Nanogune Consolider, San Sebastian, 20018, Spain
  4. Ikerbasque, Bilbao, 48011, Spain
  
• ISSN：1861-9541

文摘

The electromagnetic interaction of light with polar materials shows a sharp and well defined electromagnetic response in the infrared (IR) region that consists mainly of excitation of optical phonons. Similar to surface plasmons in the visible region, surface phonons can couple efficiently to infrared light in micron-sized antennas made of polar materials. We applied the boundary element method to calculating the infrared electromagnetic response of single SiC disks acting as effective infrared antennas as a function of different parameters such as disk size and thickness. We also analyzed the effect of locating a probing metallic tip near the SiC disk to scatter light in the proximity of the SiC disk, thereby obtaining new spectral peaks connected with localized modes between the tip and the SiC disk. We then further investigated their application in IR scanning probe microscopy. A near-field map of the phononic resonances enhances the understanding of the nature of the IR extinction peaks.