Open AccessFiber-integrated optical nano-tweezer based on a bowtie-aperture nano-antenna at the apex of a SNOM tip
Author(s) -
Ali El Eter,
Nyha Majeed Hameed,
Fadi Baida,
Roland Salut,
C. Filiâtre,
Dušan Nedeljković,
Elie Atie,
Samuel Bole,
Thierry Grosjean
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.010072
Subject(s) - near field scanning optical microscope , optics , nano , optical tweezers , aperture (computer memory) , materials science , optical fiber , nanophotonics , antenna (radio) , optical power , antenna aperture , fiber , optical microscope , optoelectronics , scanning electron microscope , physics , radiation pattern , telecommunications , laser , computer science , acoustics , composite material
We propose a new concept of fiber-integrated optical nano-tweezer on the basis of a single bowtie-aperture nano-antenna (BNA) fabricated at the apex of a metal-coated SNOM tip. We demonstrate 3D optical trapping of 0.5 micrometer latex beads with input power which does not exceed 1 mW. Optical forces induced by the BNA on tip are then analyzed numerically. They are found to be 10(3) times larger than the optical forces of a circular aperture of the same area. Such a fiber nanostructure provides a new path for manipulating nano-objects in a compact, flexible and versatile architecture and should thus open promising perspectives in physical, chemical and biomedical domains.