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  Controlling nanoscale air-gaps for critically coupled surface polaritons by means of non-invasive white-light interferometry

Pufahl, K., Paßler, N., Grosse, N. B., Wolf, M., Woggon, U., & Paarmann, A. (2018). Controlling nanoscale air-gaps for critically coupled surface polaritons by means of non-invasive white-light interferometry. Applied Physics Letters, 113(16): 161103. doi:10.1063/1.5049230.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-7F49-F Version Permalink: http://hdl.handle.net/21.11116/0000-0002-CAEF-E
Genre: Journal Article

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1901.00332.pdf (Preprint), 2MB
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arXiv:1901.00332v1 [physics.optics] 2 Jan 2019
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 Creators:
Pufahl, Karsten1, Author
Paßler, Nikolai2, Author              
Grosse, Nicolai B.1, Author
Wolf, Martin2, Author              
Woggon, Ulrike1, Author
Paarmann, Alexander2, Author              
Affiliations:
1Institute of Optics and Atomic Physics, Technical University of Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany, ou_persistent22              
2Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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 Abstract: We report an experimental method to control large-area air-gaps in the nanometer range for evanescent coupling of light to surface waves such as surface plasmon polaritons or surface phonon polaritons. With the help of spectrally resolved white-light interferometry, we are able to stabilize and tune the gap with nanometer precision and high parallelism. Our technique is non-invasive and leaves the coupling area unobstructed, and the setup delivers reference-free real-time readout up to a distance of 150 μm between the coupling prism and the sample. Furthermore, we demonstrate the application to prism coupled surface polariton excitation. The active gap control is used to determine the dispersion of a critically coupled surface phonon polariton over a wide spectral range in the mid infrared region.

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Language(s): eng - English
 Dates: 2018-07-202018-09-232018-10-162018-10
 Publication Status: Published in print
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1063/1.5049230
 Degree: -

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Title: Applied Physics Letters
  Abbreviation : Appl. Phys. Lett.
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: 4 Volume / Issue: 113 (16) Sequence Number: 161103 Start / End Page: - Identifier: ISSN: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223