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http://dx.doi.org/10.3807/KJOP.2005.16.2.162

Design of optical directional couplers using Nano-Scale MQWs  

Ho, Kwang-Chun (Department of IC Eng., Hansung University)
Publication Information
Korean Journal of Optics and Photonics / v.16, no.2, 2005 , pp. 162-167 More about this Journal
Abstract
An optical directional coupler, which consists of quantum wells with nanothickness, is designed by using Modal Transmission Line Theory (MTLT). To demonstrate the validity and usefulness, the propagation characteristics and the coupling efficiencies are rigorously evaluated at nanoscale couplers, which consist of double quantum wells with different effective masses. The numerical result reveals that the coupling efficiency of nanoscale couplers is maximized at a coupling length 2052.3 nm, if the total electron energy is 83.9 meV. Furthermore, the coupler operates as a filter with narrower band as the barrier thickness increases.
Keywords
Modal Transmission-Line Theory; MQWs(Multi-Quantum Wells); Optical Directional Couplers;
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