Plasmonic Nanofocusing and Localized Heating in Corrugated Nanoantennas

We computationally investigate the synergistic enhancement of electromagnetic and thermal fields in plasmonic nanocones via corrugated gratings. By making concentric gratings on gold cones efficiently couple light to surface plasmons, focusing energy at the apex. Finite-difference time-domain (FDTD) simulations reveal that this nanofocusing generates intense local field enhancements and steep, confined temperature gradients, significantly exceeding the performance of bare tips. The resulting localized heating and field amplification establish a robust platform for tip-enhanced applications, including mass transport control, sensing, and nanoscale manipulation.

کلیدواژه ها:

Tip effect ، plasmonic nanoantenna ، mass transport ، nanofocusing ، localized heating ، surface plasmon polariton ، corrugated grating ، thermal gradient