G. N. Zhizhin

Study of crystals in medium-and long-wavelength IR ranges by surface-electromagnetic-wave spectroscopy

First observation of excitation of surface electromagnetic waves (SEW) is reported in the reststrahlen region in for biaxial crystal KTiOPO4 (KTP) using a tunable CO2 laser around 10 µm, and for CaF2, BaF2, MgO (cubic crystals), and LiNbO3 (uniaxial crystal) in the far IR using ith a free-electron laser. The parameters of SEW propagation in these crystals have been obtained by the interference method of SEW phase spectroscopy, and the possibility of determining the complex dielectric permittivity of crystals from the SEW propagation parameters demonstrated in the range of SEW existence.

FT INFRARED SEW SPECTROSCOPY OF THIN FILMS ON METAL SURFACES BY USING A SINGLE COUPLING ELEMENT OR COMPOSITE SEW WAVEGUIDES

The example of 4-n-octadecylphenol Langmuir-Blodgett (LB) films on a copper surface is used to show the possibility of measuring IR absorption spectra of thin dielectric films on a metal grating surface by means of surface electromagnetic wave (SEW) spectroscopy. Some methodological aspects of the use of composite surface electromagnetic wave waveguides for thin-film FT-IR spectroscopy are discussed.

High-Resolution FTS Study of Isotope Effects in LiLuF4·Ho3+

Isotope structure in the spectra of the LiLuF4·Ho3+ single crystal was found by high-resolution Fourier transform spectroscopy. This structure is shown to be connected with the isotopic disorder in the lithium sublattice.

Amplitude-phase FIR and IR Spectroscopy of a Langmuir Film on Metal

Amplitude-phase surface electromagnetic wave spectroscopy is proposed as a new method for investigation of the surface of solid states and thin films on them.

Complex dielectric constant spectra measurements by means of surface waves spectroscopy. principles, realizations, examples

The surface electromagnetic waves (SEW) applications for optical constants determination in broad ER spectral range is reviewed. The SEW configuration with the maximum field on the surfaces provide...

Study of isotopic composition in crystals by high-resolution spectroscopy of monoisotope impurity

The present work was performed in order to extend the study of the relative intensities of lines within the isotope structure to other spectral transitions of different symmetry, especially of B1 yields E symmetry, and to study in more detail the widths and shapes of lines due to impurity centers with different lithium isotope composition, using the better resolution of a diode laser spectrometer (1 (DOT) 10-4 cm-1), all this being important for quantitative isotopic composition analyses.