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Title: Broadband self-collimation in C2 symmetric photonic crystals
Authors: Gümüş, Melike
Giden, İbrahim Halil
Kurt, Hamza
Keywords: Crystal structure
Group velocity dispersion
Numerical analysis
Coupling technique
Issue Date: 1-Jun-2018
Publisher: OSA - The Optical Society
Source: Gumus, M., Giden, I. H., & Kurt, H. (2018). Broadband self-collimation in C2 symmetric photonic crystals. Optics letters, 43(11), 2555-2558.
Abstract: In this study, we report a low-symmetric photonic crystal (PhC) structure that exhibits high coupling efficiency in a broadband frequency range with a tilted self-collimating capability. First, the analytical approach is implemented as a starting point, and the ideal configuration is chosen for the self-collimation effect, which is analytically supported by group velocity dispersion and third-order-dispersion calculations. Then, numerical analyses in both time and frequency domains are performed to the ideal PhC design, which possesses a strong self-collimating characteristic, even at huge incident angles within the operating frequencies. Later, experimental measurements are conducted in microwaves, and the existing self-collimation property is still preserved at longer wavelengths in the millimeter scale. The microwave experiment as well as numerical analyses indicate that the designed PhC self-collimator allows overcoming possible misalignment problems at the PhC–source interface and enables a strong broadband beam channeling with a high transmission.
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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