Rangsan Jomtarak,Preecha P. Yupapin.Multi-wavelength ?erenkov radiations in a microring resonator in combination with two gratings[J].Optoelectronics Letters,2015,11(4):252-255 Multi-wavelength ?erenkov radiations in a microring resonator in combination with two gratings Author Name Affiliation Rangsan Jomtarak  Faculty of Science and Technology, Suan Dusit Rajabhat University, Bangkok 10700, Thailand Advanced Studies Center, Department of Physics, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang KMITL, Bangkok 10520, Thailand  Preecha P. Yupapin  Advanced Studies Center, Department of Physics, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang KMITL, Bangkok 10520, Thailand Interdisciplinary Research Center, Faculty of Science and Technology, Kasem Bundit University, Bangkok 10250, Thailand Spintronics Research Center, Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand  Abstract:       In this paper, the ?erenkov radiation of light pulse in a microring and gratings is simulated and investigated. The system design consists of a two-defect grating incorporating a microring, connected with a uniform grating. In simulation, the continuous wave (CW) light pulse with wavelength centered at 1.55 ?m is input into the microring device via the two-defect grating. The resonant outputs from the two-defect grating propagate through the microring and uniform grating, where the time delays of those two input pulses with different wavelengths through the system are distinguished by the output uniform grating. From the obtained resonant output pulses, we find that the red-shifted and blue-shifted ?erenkov pulses are observed. In applications, such a proposed system can be used to form two different optical delay pulses, in which the change in ?erenkov radiation of them, i.e., time delay within a microring device system, can be useful for ?erenkov radiation imaging and sensing applications. Hits: 3984 Download times: 0 View Full Text    Download reader