7 papers
Tip-Enhanced Vibrational Ladder Climbing in Surface Molecular System
Tatsuto Mochizuki, Shota Takahashi, Atsunori Sakurai +1
Achieving high-lying vibrational states is essential for actively controlling molecular reactions. We demonstrate vibrational ladder climbing of CO adsorbed on Pt(111) within the p…
Plasmonic- and Electronic-Enhancement-Free Coherent Raman Detection of à ngström-Scale Molecular Layers at Metal Interfaces
Toshiki Sugimoto, Tomoaki Ichii, Tsuneto Kanai +5
Coherent Raman scattering provides highly sensitive vibrational analysis through nonlinear light-matter interactions. However, its application to metal interfaces has remained chal…
Phase-sensitive tip-enhanced sum frequency generation spectroscopy using temporally asymmetric pulse for detecting weak vibrational signals
Atsunori Sakurai, Shota Takahashi, Tatsuto Mochizuki +3
Vibrational sum frequency generation (SFG) spectroscopy is a powerful technique for investigating molecular structures, orientations, and dynamics at surfaces. However, its spatial…
Giant near-field nonlinear electrophotonic effects in an angstrom-scale plasmonic junction
Shota Takahashi, Atsunori Sakurai, Tatsuto Mochizuki +1
Plasmons facilitate a strong confinement and enhancement of near-field light, offering exciting opportunities to enhance nonlinear optical responses at the nanoscale. However, desp…
Diffraction-Unlimited Tip-Enhanced Sum-Frequency Vibrational Nanoscopy
Shota Takahashi, Koichi Kumagai, Atsunori Sakurai +4
Sum-frequency generation (SFG) is a powerful second-order nonlinear spectroscopic technique that provides detailed insights into molecular structures and absolute orientations at s…
Dramatic Enhancement of Supercontinuum Generation in HO by Non-Harmonic Two-Color Excitation
Tsuneto Kanai, ChengXiang Jin, Hibiki Tsunekawa +2
We demonstrate a dramatic enhancement of supercontinuum generation (SCG) in HO driven by non-harmonic two-color laser fields, where pump and seed frequencies are not integer mu…