Near Field Optical Microscopy And Spectroscopy With Pointed Probes

In this review we briefly describe the evolution of the field from the classical aperture based approach toward the development of near field optical microscopy with pointed probes.

Near field optical microscopy and spectroscopy with pointed probes.

In this review we briefly describe the evolution of the field from the classical aperture based approach toward the development of near field optical microscopy with pointed probes. 2006 05 05 00 00 00 in recent years developments in near ï eld techniques exploiting farï eld illumination of a pointed apertureless probe have demonstrated a newfound excitement. These mechanisms include raman and infrared absorption for chemical contrast as well as materials contrast based on dielectric dispersion. Aperture based near field optical microscopy as illustrated in figure 2 the spatial resolution x of standard optical.

Near field scanning optical microscopy nsom achieves an excellent product of the two factors. 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. Trautman thenear field optical interaction betweenasharpprobeandasampleof interest canbe exploitedtoimage spectroscopicallyprobe ormodifysurfacesataresolution downto 12 nm inaccessible by traditional far field techniques. Microscopy spectroscopy andsurface modification beyondthe diffraction limit eric betzig andjayk.

In order to achieve an optical resolution greater than the diffraction limit the resolution limit of conventional optical microscopy the probe tip must be brought within this near field region. Near field optical microscopy and spectroscopy with pointed probes article pdf available in annual review of physical chemistry 57 1 303 31 february 2006 with 112 reads how we measure reads. Spectroscopy with pointed probes 305 figure 1 chemical specificity versus spatial resolution for different microscopic techniques. For nsom the separation distance between probe and specimen surface is typically on the order of a few nanometers.

These mechanisms include raman and infrared absorption for chemical contrast as well as materials contrast based on dielectric dispersion. Near field optical microscopy and spectroscopy with pointed probes near field optical microscopy and spectroscopy with pointed probes novotny lukas. With the nanometer scale lateral resolution of near field scanning optical microscopes. Femtosecond pump probe near field optical microscopy review of scientific instruments 70 2758 1999.