Title :
Near-field plasmonic enhancement via nanogratings on hollow pyramidal aperture probe tip
Author :
Wang, Yuyan ; Huang, Yu-Yen ; Hoshino, Kazunori ; Gopal, Ashwini ; Zhang, Xiaojing
Author_Institution :
Univ. of Texas at Austin, Austin, TX, USA
Abstract :
We present the design of hollow near-field scanning microscope (NSOM) probe with nanogratings-on-tip to transport and concentrate localized surface plasmonic polariton (SPP) wave. By adding nano-grooves started from the intensity-maximum locations of lowest transmission mode and with pitch period supporting the metal-air interface SPP mode, the power throughput is increased at over 530 times comparing with single aperture probe with 405 nm source and 100 nm diameter aperture size. Two types of nanograting probe designs are chosen for fabrication and the power enhancement comparison is examined by probing the near-field fluorescent intensity of excited uniform quantum dots (QDs) layer via micro-contact printing method.
Keywords :
diffraction gratings; nanophotonics; near-field scanning optical microscopy; optical design techniques; plasmonics; polaritons; quantum dots; soft lithography; surface plasmons; aperture size; hollow near-field scanning microscope; hollow pyramidal aperture probe tip; intensity-maximum locations; localized surface plasmonic polariton waves; metal-air interface; microcontact printing; nanogratings; nanogrooves; near-field fluorescent intensity; plasmonic near-field enhancement; power enhancement; power throughput; quantum dots; size 100 nm; transmission mode; wavelength 405 nm; Apertures; Fluorescence; Gratings; Nanostructures; Plasmons; Probes; Throughput;
Conference_Titel :
Optical MEMS and Nanophotonics (OPT MEMS), 2010 International Conference on
Conference_Location :
Sapporo
Print_ISBN :
978-1-4244-8926-8
Electronic_ISBN :
978-1-4244-8925-1
DOI :
10.1109/OMEMS.2010.5672191
