Photon mode image recording

Table I. Comparison between heat- and photon-mode image recording...

Research on liquid crystalline polymers(LCP) is a fashionable subject with the goal of developing speciality polymers of superior mechanical and thermal properties. Besides these properties, other interesting properties of LCP have not been fully utilized. We are trying to use thermotropic LCP for photon-mode image recording material. 

HEAT-MODE AND PHOTON-MODE IMAGE RECORDING (7)... 

We have ascertained the chemical nature of the species by imaging the nanopattem by an independent method, we have recorded XPEEM images. The image in Fig. 4(c) was obtained in x-ray absorption spectroscopy mode with a photon energy of 712 eV using secondary electrons for imaging... 

Commercial laser scanning microscopes use the same microscope body and the same scan optics for one-photon and two-photon excitation. Most two-photon microscopes have lasers for one-photon excitation as well. They can switch between both modes, and between descanned and nondescanned detection. Moreover, in both the descanned and the nondescanned detection path, the light is split spectrally by additional dichroic mirrors or dispersion prisms and several detectors are used to record images in selectable wavelength ranges. The dichroic mirrors and filters are assembled on motor-driven wheels and are changed on command. The laser power... 

The surface electronic states are typically probed with PES and I-PES (photoemission measures occupied states inverse photoemission, unoccupied states) described in Section 7.3.1, or for more accuracy with two-photon photoemission (2PPE), which is particularly suitable for analyzing the image potential states. In the 2PPE technique, a first laser hght pulse (pump) excites an electron from its initial state below the Fermi level Ep into an unoccupied intermediate state (of Shockley or image potential type). A second pulse (probe) lifts the electron to the final state above the vacuum level E c. so it can be detected as a photoelectron. One of the possible data acquisition modes is to record energy-resolved spectra at a particular delay between pump and probe pulses [51]. 

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