ABSTRACT
Whispering gallery modes (WGMs) of waves in nature such as electromagnetic wave, sound wave, and matter wave have shown interesting results, which can be useful for fundamental studies and applications in optoelectronics and nanoelectronics, especially after the announcement of the 2012 Nobel Prize in Physics for WGMs [1,2], where the authors confirmed that atoms can be trapped (stopped) by using WGMs in a microsphere. However, there are two more kinds of devices that can be used to trap light beams (atoms); the use of microcavity arrays performed by Yanik and Fan [3], and a nonlinear microring resonator by Yupapin and Pornsuwancharoen [4] for stopping light. Recently, Ang and Ngo [5] have also done experiments with slowing light in microresonators using a microring system. In this article, a new design of microring resonator device is proposed, which can be used to generate four forms of light simultaneously on a chip, whereas the storing and harvesting of trapped atoms/molecules can also be available. The proposed device is made up of silica and InGaAsP/InP with linear optical add-drop filter incorporating two nonlinear micro/nano rings on both sides of the center ring (modified add-drop filter). This particular configuration is known as a PANDA ring resonator [6] as shown in Figure 14.1. Light pulse, for instance, Gaussian, and bright and dark solitons are fed into the system through different ports such as an add port and through port. By using the practical device parameters, the simulation results are obtained using the Optiwave and MATLAB programs. Results obtained by both analytical and numerical methods show that many applications can be exploited. In application, when the practical device parameters are used, then such a device can be fabricated and implemented in the near future.
