Raman spectra of various diamonds.

Micro–raman Spectroscopy of Diamonds from Hot Desert Ureilites

A. Karczemska , M. Kozanecki , A. Gucsik , A. Stanishevsky , S. Mitura . 1 Technical University of Lodz, Institute of Materials Science and Engineering, Stefanowskiego 1/15, Lodz, Poland ([email protected]); 2 Technical University of Lodz, Institute of Turbomachinery, Wolczanska 219/223, Lodz, Poland; 3 Department of Molecular Physics, Technical University of Lodz, Poland; 4 Max Planck Institu...

Attenuated total reflection Fourier transform infrared spectra of faceted diamonds.

Attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopy has been employed for characterization of faceted diamonds. ATR spectra of round brilliant cut natural diamonds of approximately 0.1 ct were observed with excellent spectral quality. The mirror-flat spectrum of the table facet enables a good contact to the ATR crystal with a minimal applied pressure. The observed AT...

FT-Raman Spectra of Saffron (Crocus Stivus L.); A Possible Method for Standardization of Saffron

FT-Raman Spectra of Saffron (crocus sativus L.) with a partial assignment is reported. Based on the Raman data, it is concluded that main pigments in saffron are crocins and crocetin. It is proposed that the quickly attainable FT-Raman spectrum of solid saffron, may be used as a means of saffron standardization.

Raman Spectra of a PMMA Microstructured Optical Fibre and Direct Measurement of Its Gain Coefficient

 A polymethylmethacrylate (PMMA) microstructured polymer optical fiber (mPOF) is fabricated and characterized. Using the cut-back technique the fiber loss is measured which is higher than the step-index silica fibers. Through a novel experimental scheme, the backward Stokes spectrum of the fabricated mPOF is recorded over a range exceeding 3000 cm‑1 during the cut-back method and compared ...

Raman spectra of misoriented bilayer graphene