An azimuthally polarized light source for the optical near field

Autor:	Ulf Peschel, Hannes Pfeifer, Peter Banzer, Daniel Ploss, Arian Kriesch
Rok vydání:	2013
Předmět:	Materials science business.industry Near-field optics Single-mode optical fiber Physics::Optics Polarization-maintaining optical fiber Near and far field Elliptical polarization Polarization (waves) Optics Optoelectronics Near-field scanning optical microscope business Gaussian beam
Zdroj:	2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC.
DOI:	10.1109/cleoe-iqec.2013.6801426
Popis:	In near field scanning optical microscopy (NSOM) a sharp tip with a defined aperture allows for direct scanning and subwavelength imaging of samples that otherwise cannot be excited from the far field. To control the interaction between tip and sample ideally a specifically prepared polarization state of light is desirable [1-3]. By coupling a Gaussian beam with an optimized elliptical polarization into a single mode optical fiber, which tapers down to a well-chosen μm scale diameter and undergoes a 60 degrees bend, we can reproducibly prepare an azimuthal polarization state at the tip aperture.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::56eff51a70f3473f8a4aef2924b3fc02 https://doi.org/10.1109/cleoe-iqec.2013.6801426 Zobrazit plný text záznamu