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This letter presents an alternative method to realize millimeter wave waveguide diplexers based on high selectivity bandpass filters. A small perturbation is implemented in a dual-mode circular cavity to expand the bandwidth and significantly enhance the selectivity of the channel filter. The location of a transmission zero can be easily adjusted by properly changing the angle of a perturbing notch...
Tight-banding approach was found to be an effective approach to gain the main feature of a coupled-cavity structure, frequency and general distribution pattern for example. A two-cavity-coupled system was shown as an example.
Selectively oxidized ring defect photonic crystal vertical cavity surface emitting laser (RD-PCVCSEL) is demonstrated. The device achieves coherent coupling over the entire continuous-wave current range.
Selectively oxidized ring defect photonic crystal vertical cavity surface emitting laser (RD-PCVCSEL) is first demonstrated. The device achieves coherent coupling over the entire continuous-wave current range.
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