Polarization-dependent far-infrared reflectivity measurements were carried out on single
crystals of anatase TiO 2. The results were analyzed to yield the dielectric dispersion …

An overview of the optical effects in solids, addressing the physics of various materials and
their response to electromagnetic radiation. The discussion includes metals …

The occurrence of longitudinal-transverse splittings in the optic-vibrational-mode
frequencies of partially ionic glasses has previously been observed in several glass systems …

We examine the possibility of using negative refraction stemming from the phonon polariton
response in an anisotropic crystal to create a simple slab lens with plane parallel sides, and …

We consider how all-angle negative refraction may be induced in anisotropic crystals by
making use of the phonon response. We investigate the example of crystal quartz at far …

The coupling between antiferromagnetic spins and infrared-active phonons in solids is
responsible for many intriguing phenomena and is a field of intense research with extensive …

We report a detailed investigation of the infrared and Raman activity of AgGaSe 2.
Performing, first, infrared studies in the spectral range 15–500 cm− 1, both at room and at …

From high‐precision Brillouin spectroscopy measurements, six elastic constants (C11, C33,
C44, C66, C12, and C14) of a flux‐grown GeO2 single crystal with the α‐quartz‐like …

Single crystals of α-quartz type Si1− xGexO2 with x< 0.2 were grown in 0.05 M NaOH
solution. Infrared measurements confirmed that crystals grown at high pressure and high …

We measured the temperature-dependent infrared reflectivity spectra of TbMnO 3 with the
electric field of light polarized along each of the three crystallographic axes. We analyzed …