AI Article Synopsis
- The study focuses on high-order fiber vector beams and their effects on tip-enhanced Raman spectra, showing they produce stronger longitudinal electric fields than traditional linear beams.
- By combining high-order fiber vector beams with linear polarized light in a TERS setup, researchers found that the resulting Raman signal from the vector beams was significantly enhanced.
- This finding indicates that high-order fiber vector beams could serve as an effective new source for excitation in tip-enhanced Raman spectroscopy.
Article Abstract
We investigated tip-enhanced Raman spectra excited by high-order fiber vector beams. Theoretical analysis shows that the high-order fiber vector beams have stronger longitudinal electric field components than linearly polarized light under tight focusing conditions. By introducing the high-order fiber vector beams and the linearly polarized beam from a fiber vector beam generator based on an electrically-controlled acoustically-induced fiber grating into a top-illumination tip-enhanced Raman spectroscopy (TERS) setup, the tip-enhanced Raman signal produced by the high-order fiber vector beams was 1.6 times as strong as that produced by the linearly polarized light. This result suggests a new type of efficient excitation light beams for TERS.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6263471 | PMC |
| http://dx.doi.org/10.3390/s18113841 | DOI Listing |
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