Faculty Publications

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Subject: search.filters.subject.Photonic crystal

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    Photonic crystal ring resonator: A promising device for a multitude applications
    (SPIE spie@spie.org, 2017) Yadunath, T.R.; Kumar, R.R.; Tupakula, T.; Kandoth, A.; John, K.; Ramakrishnan, R.K.; Das, P.P.; Badrinarayana, T.; Mohan, S.; Hegde, G.M.; Srinivas, T.
    In this paper a 2D Photonic Crystal array in SOI platform having hexagonal periodicity with a ring defect incorporated along with two bus waveguides is conceptualized and realized for various applications of optical communication, sensing etc. The ring structure filters out a resonant wavelength from the spectrum carried to it through the line defect where the resonated peak is determined by the effective ring radius. The hexagonal architecture enables more coupling length than an ideal ring structure which helps in better intensity accumulation. The resonant peak exhibited at 1554nm in simulation, which is observed in the optical characterization at 1543nm. This is attributed to the fabrication tolerance. © 2017 SPIE.
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    Design and Analysis of a Novel Optical Circulator Based on Photonic Crystal for Photonic Integrated Circuit Applications
    (Springer New York LLC barbara.b.bertram@gsk.com, 2019) Krishnan, P.; Nasre, D.
    In this paper, a novel design of a 4-port optical circulator is proposed using two-dimensional square lattice photonic crystal ring resonators. This design is suitable for photonic integrated circuit applications and allows the design to function in both clockwise and anticlockwise mode. It presents the evaluated transmission of over 84%. The nanowires in this structure are made up of silicon having a refractive index of 3.46 surrounded with air. The wide range of wavelength covers the third window of transmission, so the wavelength in this range can pass across the offered design of optical circulator. The transmission range of wavelengths is calculated and analyzed. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.