Plasmonic enhancement of vibrational signals in the infrared
Metal nanostructures offer a large variety of applications in today's technologies, because their optical properties from coherent oscillations of free electrons (so called plasmons) can be tuned over a broad frequency range from the far infrared to the visible. Of special interest is the huge near-field enhancement at resonance, because it enables extraordinarily sensitive infrared detection of vibrational excitations. The vibrational absorption lines of molecules that are located in the near-field range of the nanostructures appear as Fano-type signals on the broad plasmonic spectrum. Compared to molecular absorption spectra, the signal size in this kind of surface enhanced infrared absorption (SEIRA) can be 105 - 106 times stronger due to the contribution of resonant plasmonic light scattering. This kind of SEIRA allows very sensitive detection of biomolecules, chemicals, and ultrafine dust.
C. Huck, M. Tzschoppe, R. Semenyshyn, F. Neubrech, and A. Pucci. Chemical Identification of Single Ultrafine Particles Using Surface-Enhanced Infrared Absorption. Phys. Rev. Applied 11 (2019) 014036
This paper was highlighted by APS Physics: Focus: How to Study a Speck of Dust, by LaserFocusWorld: Bowtie nanoapertures aid SEIRA spectroscopy of ultrafine particles, and by Advances in Engineering.
M. Tzschoppe, C. Huck, J. Vogt, F. Neubrech, and A. Pucci. Impact of Metal-Optical Properties on Surface-Enhanced Infrared Absorption. J. Phys. Chem. C (2018) 122, 27, 15678-15687
F. Neubrech, C. Huck, K. Weber, A. Pucci, and H. Giessen. Surface-Enhanced Infrared Spectroscopy using Resonant Nanoantennas. Chem. Rev. (2017) 117, pp 5110–5145
C. Huck, J. Vogt, T. Neuman, T. Nagao, R. Hillenbrand, J. Aizpurua, A. Pucci, and F. Neubrech. Strong coupling between phonon-polaritons and plasmonic nanorods. Opt. Express 24 (2016) 25528-25539
- Prof. Laura Na Liu and Dr. Frank Neubrech, KIP
- Prof. Javier Aizpurua, CSIC-UPU/EHU, San Sebastian, Spain
- Dr. Tadaaki Nagao, International Center for Materials Nanoarchitechtonics, Tsukuba, Japan
- Prof. Rainer Hillenbrand, CIC nanoGUNE, San Sebastian, Spain
- Prof. Harald Giessen, 4. Physikalisches Institut, Stuttgart, Germany
- Prof. Francesco Buatier de Mongeot, Genova, Italy
If you are interested in further information or in a collaboration please contact A. Pucci.