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.
- F. Neubrech and A. Pucci. Surface-enhanced infrared spectroscopy. Spectrosc. Eur., 24(5):6-10, 2012. [Link]
- F. Neubrech and A. Pucci. Plasmonic enhancement of vibrational excitations in the infrared. IEEE J. Sel. Top. Quantum Electron., PP(99):1, 2012. [Link]
- J. Vogt, C. Huck, F. Neubrech and A. Pucci. Plasmonic light scattering and infrared vibrational signal enhancement, in Frontiers of Plasmon Enhanced Spectroscopy (ed. by Y. Ozaki), ACS Symposium Series, eBook 2016.
- 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.