A modified Plasmon Ruler equation for quasi-ordered plasmonic nanoislands

Abstract

This work report the modified Plasmon Ruler equation for quasi-ordered nanoislands using deformable nanoplasmonic membrane that able to modulate interstitial gap between neighboring nanoislands. Depending on interstitial gap, the plasmon resonance wavelength shift was achieved by averaging the plasmon resonance shift of individual nanoislands that reflects the size distribution of nanoislands. This distance dependence of plasmon coupling in quasi-ordered nanoislands provides a useful guideline to expect the plasmon resonance wavelength for surface-enhanced Raman scattering (SERS).