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Saturable absorption has been discovered in two-dimensional nanomaterial tungsten disulfide (WS2) near 1550nm. The mode-locked laser based on WS2 saturable absorber have been demonstrated, which indicates the potential of WS2 for ultrafast photonic applications.
A single-cavity dual-mode substrate integrated waveguide (SIW) bandpass filter (BPF) for X-band application is presented in this paper. Coplanar waveguide (CPW) is used as SIW-microstrip transition in this design. Two slots of the CPW with unequal lengths are used to excite two degenerate modes, i.e. TE102 and TE201. A slot line is etched on the ground plane of the SIW cavity for perturbation. Its...
A novel substrate integrated waveguide bandpass filter with circular cavity is proposed in this paper. Two circular cavities based on Substrate Integrated Waveguide are connected via connect hole. The width of the hole can control the coupling between resonators. Two different complementary Split Ring Resonators are loaded at input and output feed line to produce transmission zeros and improve the...
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