The infrared and Raman spectra of the pyrite-type crystal MnS2 are reported. Nine of the ten optically allowed q≌0 phonons are observed. A comparison of the phonon frequencies with those of FeS2 allows us to conclude that the electrostatic forces as well as the covalent sulfur-sulfur bonds ...
www.nature.com/scientificreports OPEN The effect of long‑range interactions on the infrared and Raman spectra of aragonite (CaCO3, Pmcn) up to 25 GPa Gianfranco Ulian & Giovanni Valdrè * Long-range interactions are relevant in the physical description of ...
Abstract: The generation of single photons in the mid-infrared spectral region is attracting the interest of scientific and technological research, motivated by the potential improvements that many impor- tant and emerging applications, such as quantum sensing, metrology and communication, could benefit ...
The last 15 years, UV, Visible, Infrared, Raman, and hyper-/multi-spectral imaging methods have been used thoroughly to investigate possible relationships between spectra and microbial populations. The ultimate goal of such research efforts is the development of methods that will allow for the ...
Information on the refractive indices of any photonic material in a broad spectral region is of particular importance for the precise design of highly sophisticated waveguiding structures. In our case, this concerns the refractive indices of the silk fibroin in visible and infrared spectra, but such...
nanomaterials Article Near-Infrared Surface-Enhanced Raman Scattering on Silver-Coated Porous Silicon Photonic Crystals Marko Škrabic´ 1,2, Marin Kosovic´ 3, Marijan Gotic´ 2,4, Lara Mikac 2,4, Mile Ivanda 2,4,* and Ozren Gamulin 1,2,* 1 Department of Physics and Biophysics, ...
59655 Villeneuve d'Ascq, France; FL.Constantin@univ-lille1.fr Received: 1 September 2017; Accepted: 6 October 2017; Published: 12 October 2017 Abstract: A double resonance two-photon spectroscopy scheme is discussed to probe jointly rotational and rovibrational transitions of ensembles of trapped HD...
The zero material dispersion wavelengths (ZMDW) of ChG glasses are always located at long wavelengths. For example, the ZMDW of As2Se3 glass is ~8 µm, and that of As2S3 is 5 µm [62]. Depending partly on material dispersion, the ZDWs of ChG step-index fibers also lie in ...