Local excitation and interference of surface phonon polaritons studied by near-field infrared microscopy

Autor:	Nenad Ocelic, Andreas J. Huber, Rainer Hillenbrand
Rok vydání:	2008
Předmět:	Histology Materials science business.industry Near-field optics Physics::Optics Near and far field Surface phonon Pathology and Forensic Medicine law.invention Scanning probe microscopy Optics Optical microscope law Polariton Optoelectronics business Infrared microscopy Excitation
Zdroj:	Journal of Microscopy. 229:389-395
ISSN:	1365-2818 0022-2720
Popis:	We demonstrate that mid-infrared surface phonon polariton excitation, propagation and interference can be studied by scattering-type near-field optical microscopy (s-SNOM). In our experiments we image surface phonon polaritons (SPPs) propagating on flat SiC crystals. They are excited by weakly focused illumination of single or closely spaced metal disks we fabricated on the SiC surface by conventional photolithography. SPP imaging is performed by pseudo-heterodyne interferometric detection of infrared light scattered by the metal tip of our s-SNOM. The pseudo-heterodyne technique simultaneously yields optical amplitude and phase images which allows us to measure the SPP wave vector--including its sign--and the propagation length and further to study SPP interference. High resolution imaging of SPPs could be applied to investigate for example SPP focusing or heat transfer by SPPs in low dimensional nanostructures.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c0784f53ad875b894e11228a31484a1 https://doi.org/10.1111/j.1365-2818.2008.01917.x Zobrazit plný text záznamu Plný text ve formátu PDF