Infrared phononic nanoantennas:Localized surface phonon polaritons in SiC disks  

作　　者：AMEEN Mohamed GARCIA-ETXARRI Aitzol SCHNELL Martin HILLENBRAND Rainer AIZPURUA Javier 

机构地区：[1]Department of Materials Physics,University of the Basque Country UPV/EHU [2]Centro Mixto de Física de Materiales CSIC-UPV/EHU and Donostia International Physics Centre [3]Nanooptics Group,CIC Nanogune Consolider [4]Ikerbasque

出　　处：《Chinese Science Bulletin》2010年第24期2625-2628,共4页

摘　　要：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.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.

关 键 词：表面声子 碳化硅 光磁盘 红外线 极化激元 扫描探针显微技术 电磁相互作用 电磁响应 

分 类 号：O482.3[理学—固体物理]