Nonlinear optics and spectroscopy at the nanoscale with a hollow-pyramid aperture SNOM

Nonlinear optics at the nanoscale

Development of nanotechnologies and interest for metamaterials has put a renewed interest on the subject of nonlinear optical properties of patterned metallic structures. Structures made of metal sub-wavelength objects like nanorods , or nano horseshoe shaped resonators and nanowires periodically arranged in dielectric matrices have been realized and linearly characterized. The same way, the li...

Nonlinear optics and spectroscopy.

The development of masers and lasers has been reviewed in the 1964 Nobel lectures by Townes (1) and by Basov (2) and Prokhorov (3). They have sketched the evolution of the laser from their predecessors, the microwave beam and solid state masers. Lasers are sources of coherent light, characterized by a high degree of monochromaticity, high directionality and high intensity or brightness. To illu...

Nonlinear laser spectroscopy and magneto-optics

s, Windsor 1998, p. 345; W. K. Hensinger, A. G. Truscott, H. Rubinsztein-Dunlop, and N. R. Heckenberg, ‘‘Variations of relative line intensity in saturation spectroscopy due to low magnetic fields,’’ submitted to Opt. Quantum Electron. This cell was manufactured in the early sixties and is a leftover from the intense investigations of optical pumping carried out at UC Berkeley at that time; see...

Silicon nanowires: where mechanics and optics meet at the nanoscale

Mechanical transducers based on nanowires promise revolutionary advances in biological sensing and force microscopy/spectroscopy. A crucial step is the development of simple and non-invasive techniques able to detect displacements with subpicometer sensitivity per unit bandwidth. Here, we design suspended tapered silicon nanowires supporting a range of optical resonances that confine and effici...

Keywords : NSOM , SNOM , fluorescence spectroscopy , multiphoton excitation