Design and application of photonic devices based on photonic crystal near Dirac point

Guoyan Dong

doi:10.1117/12.2327082

25 October 2018 Design and application of photonic devices based on photonic crystal near Dirac point

Guoyan Dong

Proceedings Volume 10823, Nanophotonics and Micro/Nano Optics IV; 108230R (2018) https://doi.org/10.1117/12.2327082
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

Different from conventional metamaterials comprising metallic composites with strong resonance loss at higher frequencies, photonic crystals are entirely made of dielectric with evident benefit of low loss. By proper design, photonic crystals can be regarded as zero-index medium (ZIM) at Dirac point in the center of Brillouin zone. The Dirac point can be identified precisely by analyzing transmission spectrum of finite photonic crystal array. The characteristics of effective zero-index can be applied to design some special photonic functional devices, such as filter, splitter and interferometry, etc. A subwavelength scale optical measurement mechanism has been proposed based on standing wave resonance at the Dirac frequency. The field-intensity can be detected to indicate displacement information with more precise measurement accuracy than the non-ambiguity range of half-wavelength of classical wavelength-based interferometry. The proposed design strategy of measuring device could be directly scaled in dimensions to work at different frequency bands without the need for reconfiguration. Its compact design and precise measurement effect may have significant technological potential in future electronic-photonic integrated circuits.

Citation Download Citation

Guoyan Dong "Design and application of photonic devices based on photonic crystal near Dirac point", Proc. SPIE 10823, Nanophotonics and Micro/Nano Optics IV, 108230R (25 October 2018); https://doi.org/10.1117/12.2327082

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