Lasing is achieved near frequencies where the upper and lower band edges of the adjacent photonic crystals overlap (i.e., band edge resonance).
The 1594 and 1355 cm−1 signals are near frequencies attributed to ring stretching in polyaromatic compounds, or disordered graphitic carbon species, at 1580 and 1360 cm−1.
These structures can exhibit a new type of band or gap, for the incidence angles other than normal incidence, near frequencies where the electric permittivity of the plasma layer changes sign.
According to the results, one of conclusions is "the greater the frequency separation between a harmonic and its nearest frequency neighbors, the easier it was to capture it out of the complex tone".
Form the new consensus sequence from this multiple alignment of the two aligned sequences by finding the nearest frequency column cluster in each position.
A seed consensus sequence is formed from these cores by finding the nearest frequency profile cluster in each position of this seed pairwise alignment.
These frequency estimates may be considered as trivial but for the high correlation of 0.94 between two nearest frequencies and the difference about 0.3 Hz between them that is observed for roughly 70%% of all cases.
