Extraordinary nonlinear response of nanoparticles in double nanohole optical tweezers

Nonlinear optics provides the functionality of wavelength conversion and switching that allows for photonic signal processing and bioimaging. A major obstacle for extreme photonic integration is the requirement to use ultrafast pulsed lasers or to work above the diffraction limit to activate nonlinear optical processes. Here we show that plasmonic enhancement and two dimensional materials provide a promising pathway to extreme photonic integration with nonlinear functionality in nanoscale while using diode lasers.