Square dielectric THz waveguides.

A holey cladding dielectric waveguide with square cross section is designed, simulated, fabricated and characterized. The TOPAS waveguide is designed to be single mode across the broad frequency range of 180 GHz to 360 GHz as shown by finite-difference time domain simulation and to robustly support simultaneous TE and TM mode propagation. The square fiber geometry is realized by pulling through a heat distribution made square by appropriate furnace design. The transmitted mode profile is imaged using a vector network analyzer with a pinhole at the receiver module. Good agreement between the measured mode distribution and the calculated mode distribution is demonstrated.

Técnica de sutura na área receptora para o enxerto gengival livre / Sutures on the recipient site for free gingival graft

Os autores, apoiados na literatura, descrevem as possibilidades de sutura do enxerto gengival livre na área receptora e sugerem baseados em sua experiência, uma técnica variável