Journal ArticleDOI
Disorder-induced scattering loss of line-defect waveguides in photonic crystal slabs
TLDR
In this paper, the authors quantitatively analyzed the origin of the loss spectrum shape using a photon Green function theory and obtained a very good agreement, thus providing an explanation of the complex physical mechanisms responsible for the observed propagation loss.Abstract:
Detailed propagation loss spectrum measurements for line-defect waveguides in silicon photonic crystal slabs are presented, which show record low loss values $(5\phantom{\rule{0.3em}{0ex}}\mathrm{dB}∕\mathrm{cm})$ and complicated frequency dependence. We quantitatively analyze the origin of the loss spectrum shape using a photon Green function theory and obtain a very good agreement, thus providing an explanation of the complex physical mechanisms responsible for the observed propagation loss. In particular, we demonstrate the influence of out-plane, backward, intermode, and in-plane scattering processes on the observed loss spectra, induced by the structural disorder that occurs during fabrication, and highlight the importance of backward and intermode scattering in these waveguides.read more
Citations
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Journal ArticleDOI
Slow light in photonic crystals
TL;DR: In this article, the background theory of slow light, as well as an overview of recent experimental demonstrations based on photonic-band engineering are reviewed, and practical issues related to real devices and their applications are also discussed.
Journal ArticleDOI
Binary bat algorithm
TL;DR: The proposed binary bat algorithm (BBA) is able to significantly outperform others on majority of the benchmark functions and there is a real application of the proposed method in optical engineering called optical buffer design that evidence the superior performance of BBA in practice.
Journal ArticleDOI
Ultrahigh-Q photonic crystal nanocavities realized by the local width modulation of a line defect
Eiichi Kuramochi,Masaya Notomi,Satoshi Mitsugi,Akihiko Shinya,Takasumi Tanabe,Toshifumi Watanabe +5 more
TL;DR: In this article, the authors proposed an ultrahigh quality factor (Q) photonic crystal slab nanocavity created by the local width modulation of a line defect, which has an intrinsic Q value of up to 7×107.
Journal ArticleDOI
Manipulating light with strongly modulated photonic crystals
TL;DR: In this paper, the authors describe the way in which strongly modulated photonic crystals differ from other optical media, and clarify what they can do, including light confinement, frequency dispersion and spatial dispersion.
Journal ArticleDOI
Subwavelength grating periodic structures in silicon-on-insulator: a new type of microphotonic waveguide.
Przemek J. Bock,Pavel Cheben,Jens H. Schmid,Jean Lapointe,André Delâge,Siegfried Janz,Geof C. Aers,Dan-Xia Xu,Adam Densmore,Trevor J. Hall +9 more
TL;DR: Experimental measurements indicate a propagation loss as low as 2.1 dB/cm for subwavelength grating waveguide with negligible polarization and wavelength dependent loss, which compares favourably to conventional microphotonic silicon waveguides.
References
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Journal ArticleDOI
Extremely Large Group-Velocity Dispersion of Line-Defect Waveguides in Photonic Crystal Slabs
TL;DR: Waveguiding characteristics and group-velocity dispersion of line defects in photonic crystal slabs as a function of defect widths reveal that they can be tuned by controlling the defect width, and the results agree well with theoretical calculations, indicating that light paths with made-to-order dispersion can be designed.
Journal ArticleDOI
Ultra-low loss photonic integrated circuit with membrane-type photonic crystal waveguides
TL;DR: The combination of an efficient two-stage coupling scheme and utilization of ultra-long (up to 2mm) photonic crystal waveguides reduces the uncertainty in determining the loss figure to 3dB/cm.
Journal ArticleDOI
Linear waveguides in photonic-crystal slabs
TL;DR: In this article, a systematic analysis of waveguides in photonic-crystal slabs is presented, and the considerations that must be applied to achieve single-mode guided bands in these systems are discussed.