Wd. Sheng, A NOVEL QUANTUM DIRECTIONAL COUPLER BASED ON PI-SHAPED COUPLED ELECTRON WAVE-GUIDES, Journal of physics. D, Applied physics, 29(12), 1996, pp. 3166-3168
We explore the possibility of a quantum directional coupler based on P
i-shaped coupled electron waveguides with smooth boundaries. By calcul
ating the transmission spectra, we propose an optimized coupler struct
ure with a high directivity and fine uniformity. The coupler specifica
tions, directivity, uniformity, and coupling coefficient are evaluated
.