| Zugriffsnummer | 39018 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Enhancing the sensitivity of nano-FTIR spectroscopy |
| Autor(in); Institution |
Hermann, Peter; 7.2, Kryophysik und Spektrometrie, PTB-Berlin
Kästner, Bernd; 7.2, Kryophysik und Spektrometrie, PTB-Berlin
Hoehl, Arne; 7.2, Kryophysik und Spektrometrie, PTB-Berlin
Kashcheyevs, Vyacheslavs; University of Latvia, Faculty of Physics and Mathematics, Riga, LATVIA
Patoka, Piotr; Freie Universität Berlin, Physikalische und Theoretische Chemie, Institut für Chemie und Biochemie, Berlin, GERMANY
Ulrich, Georg; 7.2, Kryophysik und Spektrometrie, PTB-Berlin
Feikes, Jörg; Helmholtz Zentrum Berlin für Materialien und Energie, Berlin, GERMANY
Ries, Markus; Helmholtz Zentrum Berlin für Materialien und Energie, Berlin, GERMANY
Tydecks, Tobias; Helmholtz Zentrum Berlin für Materialien und Energie, Berlin, GERMANY
Beckhoff, Burkhard; 7.2, Kryophysik und Spektrometrie, PTB-Berlin
Rühl, Eckart; Freie Universität Berlin, Physikalische und Theoretische Chemie, Institut für Chemie und Biochemie, Berlin, GERMANY
Ulm, Gerhard; 7, Temperatur und Synchrotronstrahlung, PTB-Berlin
|
| Quelle/Jahr | Optics Express: 25 (2017), 14, 16574 - 16588 |
| Availability | [online only] |
| ISSN | 1094-4087 |
| DOI | |
| Verlag | Optical Society of America |
| Klassifikationscode | OCIS: 120.0120 ; OCIS: 180.4243 |
| Zusammenfassung | Abstract: Synchrotron radiation-based nano-FTIR spectroscopy utilizes the highly brilliant and ultra-broadband infrared (IR) radiation provided by electron storage rings for the infrared spectroscopic characterization of samples at the nanoscale. In order to exploit the full potential of this approach we investigated the influence of the properties of the radiation source, such as the electron bunch shape and spectral bandwidth of the emitted radiation, on near-field infrared spectra of silicon-carbide (SiC). The adapted configuration of the storage ring optics enables a modification of the transverse electron bunch profile allowing an increase of the measured near-field signal amplitude. Additionally, the decay of the signal amplitude due to the decreasing storage ring current is also eliminated. Further options for improving the sensitivity of nano-FTIR spectroscopy, which can also be applied to other broadband radiation sources, are the adaption of the spectral bandwidth to the wavelength range of interest or the use of polarization optics. The sensitivity enhancement emerging from these options is verified by comparing near-field spectra collected from crystalline SiC samples. The improvement in sensitivity by combining these approaches is demonstrated by acquiring nano-FTIR spectra from thin organic films, which show weak resonances in the IR-regime. |
| Kostenfreier Zugang | Open Access Gold |
Zitierung
Hermann, P., Kästner, B., Hoehl, A., Kashcheyevs, V., Patoka, P., Ulrich, G., Feikes, J., Ries, M., Tydecks, T., Beckhoff, B., Rühl, E., & Ulm, G. (2017). Enhancing the sensitivity of nano-FTIR spectroscopy. Optics Express, 25(14), 16574–16588. https://doi.org/10.1364/oe.25.016574