High efficiency devices based on slow light in photonic crystals

Waveguides;Photonic crystals;Integrated optics;Bends;Couplers;Sensing;Absorbing boundary condition

Askari, Murtaza ; Electrical and Computer Engineering

University:Georgia Institute of Technology

Department:Electrical and Computer Engineering

关键词: Waveguides;    Photonic crystals;    Integrated optics;    Bends;    Couplers;    Sensing;    Absorbing boundary condition;   

Others  :  https://smartech.gatech.edu/bitstream/1853/39558/1/askari_murtaza_201105_phd.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

Photonic crystals have allowed unprecedented control of light and have allowed bringing new functionalities on chip. Photonic crystal waveguides (PCWs), which are linear defects in a photonic crystal, have unique features that distinguish these waveguides from other waveguides. The unique features include very large dispersion, existence of slow light, and the possibility of tailoring the dispersion properties for guiding light. In my research, I have overcome some of the challenges in using slow light in PCWs. In this work, I have demonstrated (i) high efficiency coupling of light into slow group velocity modes of a PCW, (ii) large bandwidth high transmission and low dispersion bends in PCWs, (iii) accurate modeling of pulse propagation in PCWs, (iv) high efficiency absorbing boundary conditions for dispersive slow group velocity modes of PCWs. To demonstrate the utility of slow light in designing high efficiency devices, I have demonstrated refractive index sensors using slow light in PCWs. In the end, a few high efficiency devices based on slow light in PCWs are mentioned. The remaining issues in the widespread use of PCW are also discussed in the last chapter.