Polarization Control with Plasmonic Antenna Tips: A Universal Approach to Optical Nanocrystallography and Vector-Field Imaging

• DOI: 10.1021/acs.nanolett.8b00108
• Publication Date: 2018-03-23T20:59:02Z
• Authors: Kyoung-Duck Park; Markus B. Raschke
• Keywords: 0301 basic medicine; RAMAN-SCATTERING; Tip-enhanced second-harmonic generation; domain boundary; SYMMETRY; WSE2; FOS: Physical sciences; 535; 02 engineering and technology; YMnO3; optical nanocrystallography; 03 medical and health sciences; ROOM-TEMPERATURE; LIGHT; vector-field control; 2ND-HARMONIC GENERATION; SINGLE-MOLECULE; MoS2; 0210 nano-technology; Physics - Optics; Optics (physics.optics)

Controlling the propagation and polarization vectors in linear nonlinear optical spectroscopy enables us to probe anisotropy of responses providing structural symmetry selective contrast imaging. Here, we present a novel tilted antenna-tip approach control vector-field by breaking axial nanoprobe tip-enhanced near-field microscopy. This gives rise localized plasmonic antenna effect with significantly enhanced field both in-plane out-of-plane components. We use resulting specificity response second-harmonic generation (SHG) for generalized nanocrystallography In SHG imaging monolayer MoS2 films single-crystalline ferroelectric YMnO3, reveal nanocrystallographic details domain boundaries topology sensitivity nanoscale spatial resolution. The is applicable any anisotropic molecular or quantum materials.