Title :
Lensless focusing with subwavelength resolution by an array of nanoholes
Author :
Huang, Fu Min ; Chen, Yifang ; de Abajo, F.Javier Garcia ; Zheludev, Nikolay
Author_Institution :
Southampton Univ., Southampton
Abstract :
We provide the first experimental evidence of focusing light into subwavelength spots by a 2D planar photonic structure. When a quasi-periodic array of nanoholes was illuminated with coherent light sources, it created very rich diffraction patterns at different heights to the array. At specific heights, we observed diffraction patterns containing subwavelength spots. The ability to focus light into subwavelength spots is of fundamental importance for applications in a wide range of areas, e.g. microscopy, photo lithography, data storage etc.
Keywords :
electron beam lithography; optical focusing; photonic crystals; scanning electron microscopy; 2D planar photonic structure; lensless focusing; nanoholes array; quasi-periodic array; subwavelength resolution; Apertures; Focusing; Lithography; Optical arrays; Optical diffraction; Optical films; Optical microscopy; Optical surface waves; Scanning electron microscopy; Substrates;
Conference_Titel :
Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-0931-0
Electronic_ISBN :
978-1-4244-0931-0
DOI :
10.1109/CLEOE-IQEC.2007.4386574