Commenced in January 2007
Paper Count: 29994
Enhancement of Raman Scattering using Photonic Nanojet and Whispering Gallery Mode of a Dielectric Microstructure
Abstract:We report the enhancement of Raman scattering signal by one order of magnitude using photonic nanojet (PNJ) of a lollipop shaped dielectric microstructure (LSDM) fabricated by a pulsed CO₂ laser. Here, the PNJ is generated by illuminating sphere portion of the LSDM with non-resonant laser. Unlike the surface enhanced Raman scattering (SERS) technique, this technique is simple, and the obtained results are highly reproducible. In addition, an efficient technique is proposed to enhance the SERS signal with the help of high quality factor optical resonance (whispering gallery mode) of a LSDM. From the theoretical simulations, it has been found that at least an order of magnitude enhancement in the SERS signal could be achieved easily using the proposed technique. We strongly believe that this report will enable the research community for improving the Raman scattering signals.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1316339Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF
 K. Kneipp, M. Moskovits, H. Kneipp, Surface-Enhanced Raman Scattering: Physics and Applications (Springer, Berlin, 2006).
 K. J. Yi, H. Wang, Y. F. Lu, and Z. Y. Yang, “Enhanced Raman scattering by self-assembled silica spherical microparticles” J. Appl. Phys. 101, 063528 (2007).
 C. L. Du, J. Kasim, Y. M. You, D. N. Shi and Z. X. Shen, “Enhancement of Raman scattering by individual dielectric microspheres” J. Raman Spectrosc. 42, 145 (2011).
 V. R. Dantham, P. B. Bisht, and C. K. R. Namboodiri, “Enhancement of Raman scattering by two orders of magnitude using photonic nanojet of a microsphere” J. Appl. Phys. 109, 103103 (2011).
 J. F. Cardenas, “Raman scattering enhancement by dielectric spheres” J. Raman. Spectrosc. 44, 540 (2013).
 Y. Yan, C. Xing, Y. Jia, Y. Zeng, Y. Zhao, and Y. Jiang, “Selfassembled dielectric microsphere array enhanced Raman scattering for large-area and ultra-long working distance confocal detection.” Opt. Express 23, 25854 (2015).
 Z. Chen, A. Taflove, and V. Backman, “Photonic nanojet enhancement of backscattering of light by nanoparticles: a potential novel visible-light ultramicroscopy technique” Opt. Express 12, 1214 (2004).
 S. Lecler, Y. Takakura, and P. Meyrueis, “Properties of a threedimensional photonic jet” Opt. Lett. 30, 2641 (2005).
 A. V. Itagi, and W. A. Challener, “Optics of photonic nanojets” J. Opt. Soc. Am. A 22, 2847 (2005).
 A. Devilez, N. Bonod, J. Wenger, D. Gérard, B. Stout, H. Rigneault, and E. Popov, “Three-dimensional subwavelength confinement of light with dielectric microspheres” Opt. Express 17, 2089 (2009).
 I. Alessandri, N. Bontempi and L. E. Depero, “Colloidal lenses as universal Raman scattering enhancers” RSC Advances 4, 38152 (2014).
 G. M. Das, R. Laha, and V. R. Dantham, “Photonic nanojet