In this report, we investigate the influences of the small gap in whispering-gallery modes on energy coupling, resonance quality and frequency. Photon tunneling between an optical resonator and its light-delivery coupler depends strongly on the gap dimension which can vary from zero to size of an optical wavelength involved. An optimal gap dimension is found to exist for maximum energy coupling...

Monitoring of completed buildings often identifies significant gaps between the predicted and actual energy use of buildings. This is referred to as the ‘energy performance gap’. To date, most research on the energy performance gap has focussed on nondomestic buildings; this paper presents a case study from the UK domestic sector. Monitoring equipment was installed in six identical flats locate...

by means of first principles calculations we show that both rutile and anatase phases of bulk tio2 doped by s, se or pb can display substantial decreasing in the band gap (up to 50%), while doping by zr does not sizably affect the band-gap value. moreover, the absorption edge is shifted (up to 1 ev) to the lower energy range in the case of tio2 doped by s or pb that opens a way to enhancing of ...

We use angle-resolved photoemission spectroscopy to investigate the energy gap(s) in (Bi,Pb)2(Sr,La)2CuO6+delta. We find that the spectral gap has two components in the superconducting state: a superconducting gap and pseudogap. Differences in their momentum and temperature dependence suggest that they represent two separate energy scales. Spectra near the node reveal a sharp peak with a small ...

Recent inelastic-neutron-scattering measurements of a low-energy phonon in Bi 2 Sr 2 CaCu 2 O 8 provide enough information to place a lower bound on the energy gap magnitude at precise locations on the Fermi surface. Measurements of a few low-energy phonons should indicate whether the gap symmetry is d x 2 −y 2. Further measurements could map out the angle-resolved gap magnitude on the entire F...

In this paper, the structural parameters, energy bands structure, density ofstates and charge density of HgSe in the Zincblende(B3) phase have been investigated.The calculations have been performed using the Pseudopotential method in theframework of density functional theory (DFT) by Quantum Espresso package. Theresults for the electronic density of states (DOS) show tha...

In this research, the quantum mechanics calculations were carried out to elucidate the adsorption behavior of metronidazole drug on the surface of pristine as well as doped C60 fullerene with Si, B and Al using density functional theory (DFT) at B3LYP/6-31G(d,p) level. After optimization of the structures, various parameters such as HOMO and LUMO energies, gap energy, adsorption ener...