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Title: High Extinction Ratio Polarization Beam Splitter Design by Low-Symmetric Photonic Crystals
Authors: Yasa, Utku Görkem
Turduev, Mirbek
Giden, İbrahim Halil
Kurt, Hamza
Keywords: Photonic crystals
photonic integrated circuits
polarization beam splitters
Issue Date: 1-May-2017
Publisher: IEEE-Inst Electrical Electronics Engineers Inc
Source: Yasa, U. G., Turduev, M., Giden, I. H., & Kurt, H. (2017). High extinction ratio polarization beam splitter design by low-symmetric photonic crystals. Journal of Lightwave Technology, 35(9), 1677-1683.
Abstract: A novel concept of polarization beam splitting with high polarization extinction ratio is proposed based on the polarization sensitive self-collimation feature of symmetry reduced photonic crystals. The idea utilizes self-collimation mechanism and rotated isofrequency contours arising due to the deliberately implemented symmetry reduction in the photonic structure. Square lattice of low-symmetric rectangular air holes in dielectric background are numerically analyzed in both frequency and time domains. The operating bandwidth of the device is Delta lambda = 53 nm. At lambda = 1.55 mu m, polarization extinction ratios are similar to 23 and similar to 18 dB for transverse electric and transverse magnetic ports, respectively. The investigated device is 46.4 mu m x 12.4 mu m in size and based on a uniform, planar, and homogenous structure. Therefore, there is no need for an additional splitting assistance to separate the two orthogonal polarizations. Possible fabrication imperfections are also analyzed and it is observed that polarization extinction ratios stay above 17 dB when error percentage is around 5.5%. With having these advantages, symmetry reduced photonic crystal-based polarization beam splitters can be a good candidate for optical communication applications.
ISSN: 0733-8724
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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