Remote excitation of hot electrons

Gratings allow light to excite propagating surface plasmon polariton (SPP) modes. When these SPPs reach a tunneling nanogap, they can induce hot electron tunneling, detected via open-circuit voltage. Local junction symmetry matters, as SPPs propagating in one direction can lead to hot electrons flowing the opposite direction. This work, led by Charlotte Evans, was reported in J. Phys. Chem. C..

Electrical detection of propagating plasmons

We can detect propagating surface plasmon polaritons (SPPs) electrically throught their heating of the metal. Remotely launching these SPPs gets optical energy to a nanoscale constriction while minimizing the local temperature increase (by 60x compared to direct illumination of the constriction). This work, led by Ms. Charlotte Evans, was reported in Nano Lett..

Large photovoltages in nanogaps

Tunneling of hot electrons generated by plasmon-enhanced optical absorption can lead to comparatively large photovoltages in metal nanogaps. This work, led by Dr. Pavlo Zolotavin was reported in J. Phys. Chem. Lett., and highlighted in a news release. Click here to see a LiveSlides presentation about the work.