Near Field Optical Microscopy

Near field scanning optical microscopy introduction.

Near field optical microscopy.

Optical spectroscopy provides a wealth of information on structural and dynamical characteristics of materials. The fourth harmonic generation of a continuous wave ti sapphire laser is the excitation source. The same depth of field versus magnification. Herein we develop a duv scanning near field optical microscope snom with an excitation wavelength of 210 nm.

For ultra high optical resolution near field scanning optical microscopy nsom is currently the photonic instrument of choice near field imaging occurs when a sub micron optical probe is positioned a very short distance from the sample and light is transmitted through a small aperture at the tip of this probe. Moonitz noah shepard rodrigo noriega. Scanning near field optical microscopy snom is a technique capable of optically investigating the surface of a sample to form either a high resolution two dimensional image or to perform a local spectroscopy. Two negative feedback control systems stabilize the power and pointing allowing scanning microscopy to be carried out over a long period.

Infrared scattering type scanning near field optical microscopy of biomembranes in water. For ultra high optical resolution near field scanning optical microscopy nsom is currently the photonic instrument of choice near field imaging occurs when a sub micron optical probe is positioned a very short distance from the sample and light is transmitted through a small aperture at the tip of this probe. An optical microscope fig. Richards artech house norwood 2009 pp.

Hillenbrand near field nanoscopy by elastic light scattering from a tip in nano optics and near field optical microscopy edited by a. Near field scanning optical microscopy nsom or scanning near field optical microscopy snom is a microscopy technique for nanostructure investigation that breaks the far field resolution limit by exploiting the properties of evanescent waves in snom the excitation laser light is focused through an aperture with a diameter smaller than the excitation wavelength resulting in an evanescent. One of the first techniques used to study the topography of a surface is optical microscopy also called light microscopy. Multimodal spectroscopic investigation of the conformation and local environment of biomolecules at an electrified interface.

A fundamental principle in diffraction limited optical microscopy requires that the spatial resolution of an image is limited by the wavelength of the incident light and by the numerical apertures of the condenser and objective lens systems. Near field scanning optical microscopy nsom probes. 4 3 uses a light microscope with dual eyepieces. Near field scanning optical microscopy.