hexagonal GaN,ZnO, and AlN.The cutoff frequency at 1926cm -1 of the second-order Raman is not the overtone of the A 1(LO) peak of the n-type doping 4H-SiC,but that of the undoping one.The second-order Raman spectrum of 4H-SiC can hardly be affected by doping species or doping ...
accompanied by a broad two-photon luminescence (TPL) peak with comparable intensity. The TPL peak occurs at the anti-bonding dipolar resonance wavelength∼550nm(Fig.1e), which provides a doubly-resonant enhancement mechanism for the TPL
devices at 1.5 μm. However, the performance of such quantum light sources is limited by the spontaneous Raman scattering (SpRS) noise. Although the SpRS noise has been experimentally investigated in those sources67, the further endeavor to suppress such noise for high-performance quantum light ...
The intensity is normalized to the peak intensity of the seed, I0 = 1012 W/cm2. (a) corresponds to the case of 6 harmonics resonant with the gain lines of odd orders with ( P Ω ) 6 H ( o d d ) = 5.27 ; (c)—to the case of 7 harmonics resonant with even order gain ...
We use Raman scattering to study the second-order structural transition in metallic Ca 2 - x Sr x RuO 4 for x = 0.3 . With increasing temperature, the following phonon behaviors are observed in the Raman spectra: the 320 cm - 1 mode exhibits an enhancement both in peak energy and in ...
Peak2 had positive correlation with peak3 in the synchronous map (Fig. 7a), while negative correlation in the asynchronous map (Fig. 7b). This indicated that the changing order was peak3 → peak2 according to Noda’s rule(Coble, 1996). There was a positive relationship between peak2 and...
Within this process, the second endothermic peak detected at 436 °C reveals the starting of the decomposition of the material. The sharpness of all peaks in DTA and TGA confirms the high degree of crystallinity and purity of the LHPPI single crystal [30]. It is interesting to note that ...
The failure in measuring a phase-matching SH peak could be attributed to a weak intensity at the tapered region equivalent to 0.046% of the incident pulse intensity. In summary, the 140-m fibre length proved to be optimal, which also allowed us to test spheres with Q factors that are ...
A more empirical correction is to simply multiply the calculated frequencies by a scale factor (0.96 for the gas phase and 0.93 for the liquid phase) that can bring the calculated peak positions in better agreement with those observed experimentally. The IR and Raman spectra of liquid water ...
Pressure dependence of the Boson peak in glassy As2S3 studied by Raman scattering A detailed pressure dependence study of the low energy excitations of glassy As2S3 is reported over a wide pressure range, up to 10GPa. The spectral featur... KS Andrikopoulos,D Christofilos,GA Kourouklis,.....