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.

 

Literature examples

 
DATES
December 2022
Mon Tue Wed Thu Fri Sat Sun 
10 11 
12 13 14 15 16 17 18 
19 20 21 22 23 24 25 
26 27 28 29 30 31 
Recent Publications