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Proceedings Paper

Extending the functions of scanning near-field optical microscopy
Author(s): A. Horneber; M. van den Berg; J. Rogalski; K. Swider; K. Braun; M. Meixner; A. J. Meixner; D. Zhang
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Paper Abstract

Advanced optical setups are continuously developed to gain deeper insight into microscopic matter. In this paper we report the expansion of a home-built parabolic mirror assisted scanning, near-field optical microscope (PMSNOM) by introducing four complementary functions. 1) We integrated a scanning tunneling feedback function in addition to an already existent shear-force feedback control mechanism. Hence a scanning tunneling microscope (STM)-SNOM is realized whose performance will be demonstrated by the tip-enhanced Raman peaks of graphene sheets on a copper substrate. 2) We integrated an ultrafast laser system into the microscope which allows us to combine nonlinear optical microscopy with hyperspectral SNOM imaging. This particular expansion was used to study influences of plasmonic resonances on nonlinear optical properties of metallic nanostructures. 3) We implemented a polarization angle resolved detection technique which enables us to analyze the local structural order of α-sexithiophene (α-6T). 4) We combined scanning photocurrent microscopy with the microscope. This allows us to study morphology related optical (Raman and photoluminescence) and electrical properties of optoelectronic systems. Our work demonstrates the great potential of turning a SNOM into an advanced multifunctional microscope.

Paper Details

Date Published: 28 August 2014
PDF: 9 pages
Proc. SPIE 9169, Nanoimaging and Nanospectroscopy II, 91690G (28 August 2014); doi: 10.1117/12.2063160
Show Author Affiliations
A. Horneber, Eberhard Karls Univ. Tübingen (Germany)
M. van den Berg, Eberhard Karls Univ. Tübingen (Germany)
J. Rogalski, Eberhard Karls Univ. Tübingen (Germany)
K. Swider, Eberhard Karls Univ. Tübingen (Germany)
K. Braun, Eberhard Karls Univ. Tübingen (Germany)
M. Meixner, Eberhard Karls Univ. Tübingen (Germany)
A. J. Meixner, Eberhard Karls Univ. Tübingen (Germany)
D. Zhang, Eberhard Karls Univ. Tübingen (Germany)

Published in SPIE Proceedings Vol. 9169:
Nanoimaging and Nanospectroscopy II
Prabhat Verma; Alexander Egner, Editor(s)

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