Nanophotonics - Nanoelectronics

Tip etching gallery

Etched gold tip

 

Scanning Electron Microscopy (SEM) image of an electrochemically etched gold wire for atomic force microscopy. These tips are suited for Tip Enhanced Raman Spectroscopy (TERS).

 

A smooth surface is important for TERS to achieve a strong nearfield by surface plasmon resonances only at the apex of the tip.

 

High tip curvature to enhance the lightning rod effect.

 

Light microscopy image of a gold tip.

Mischa Nicklaus

 

Lithium Niobate

 

Tapping mode AFM scan (phase contrast) on a polished periodically poled lithium niobate crystal. The tip has been deliberately decorated with dipole molecules and Coulombic interaction is causing the contrast along the domain walls between the out-of-plane polarized domains.

Mischa Nicklaus