کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7924952 | 1512499 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultra-slow light with high NDBP achieved in a modified W1 photonic crystal waveguide with coupled cavities
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Here, a modified W1Â photonic crystal waveguide consisting of silicon rods arranged in a hexagonal lattice in the air is investigated for the aim of obtaining highly flattened defect band under the light line. This condition results in achieving ultra-low group velocity and suppresses the out of plane scatterings, simultaneously. The presented waveguide which is composed of the periodic coupled cavities inside the channel, provided high time delay with group index of ngâ¼647 and improved normalized delay bandwidth product of â¼0.54 for the propagating wave. A group velocity of about â¼0.001545c is achieved by immersing the rods with the optimized radius and periodicity of r=0.2a and 3a into the center of the channel, respectively. The PWE and the FDTD results with slight discrepancy, present the feasibility of ultra-slow light phenomenon in the presented structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 424, 1 October 2018, Pages 37-43
Journal: Optics Communications - Volume 424, 1 October 2018, Pages 37-43
نویسندگان
Ali Ebrahimi, Mina Noori,