Understanding terahertz optical properties of amorphous carbon thin films

Electromagnetic properties of model vitreous carbon foams

“…Carbon foams' properties in the microwave domain were investigated by using three different waveguide devices of rectangular cross-sections 23  10 mm², 7.2  3.4 mm² (see Fig. S2 of the Electronic Supplementary Information), and 2  4.3 mm² for measurements in X-band (8-12 GHz), Ka-band (26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38) and partially in V-band (40-53 GHz), respectively.…”

“…Foams cut as parallelepipeds were analysed in the Ka-band (26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38) to observe the influence of density on the coefficients A, R and T. These parameters at 26 GHz are shown in Fig. 5.…”

“…Carbonaceous materials are indeed generally characterised by Raman spectroscopy and most of the time present at least two main characteristic peaks corresponding to phonon resonances that should be located at the end of the range investigated here, i.e., close to 18100 and 17900 cm -1 for an excitation at 514 nm (i.e., an incident energy of 2.41 eV). On the other hand, infrared spectrometry studies usually deal with wavenumbers above 500 cm -1 [28][29][30]. Coals derived from the carbonisation of biomass were investigated in terahertz spectroscopy between 250 and 500 cm -1 [31].…”

Влияние Неравновесных Условий Синтеза На Структуру И Оптические Свойства Аморфных Углеродных Пленок

“…Последние три десятилетия особое внимание уделяется изучению тонких аморфных алмазоподобных углеродных (DLC) пленок [2][3][4][5][6][7]. Существует много способов синтеза DLC-пленок в качестве покрытий, обладающих лучшими антифрикционными, прочностными и химически инертными свойствами [8][9][10].…”