This work presents the application of organic semiconductor distributed feedback laser as
free-space excitation source in Raman spectroscopy. Surface-enhanced Raman scattering effect is
exploited to improve the detection sensitivity. The SERS condition is achiedved by using
substrates consisting of gold-coated polymeric nanopillar arrays. The organic-laser-excited
SERS measurements are applied to verify the concentration variation of biomolecule adenosine in
aqueous solutions.
