[19p-F310-1~15] 3.12 Nanoscale optical science and near-field optics

△ [19p-F310-9] Selective CARS microscopy employing dual-wavelength ultrafast nanofocused plasmon pulses

〇Keita Tomita¹, Yasuhiro Kojima¹, Fumihiko Kannari¹ (1.Keio Univ.)

Keywords:nanofocusing, CARS

Aluminum (Al) is expected to excite surface plasmon polariton (SPP) which strongly localizes and propagates on the metal -dielectric interface in the visible and ultraviolet wavelength region. Thus, to nanofocus SPP pulses simultaneously at 800 and 400 nm, we used an Al tapered tip with a curved grating structures. In this work, we demonstrated selective CARS measurements of a multi-walled carbon nanotube with nanofocused SPP pulses simultaneously at 800 and 400 nm using an Al tapered tip.