Slow Light Propagation in Liquid-Crystal Infiltrated Silicon-On-Insulator Photonic Crystal Channel Waveguides

Rawal, Swati; Sinha, R. K.; Rue, R.M. De La

doi:10.1109/jlt.2010.2053915

Cited by 13 publications

(6 citation statements)

References 47 publications

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“…Photonic crystal waveguide (PCW) application with slow light properties have been widely discussed [16][17][18][19][20][21][22][23][24][25][26] in the recent years. Slow light becomes possible to control the speed of light and can be applied to a great variety of applications, such as delay lines that control the arrival of optical signals and optical buffers.…”

Section: Time-division-multiplexer (Tdm) System Design Modelingmentioning

confidence: 99%

New Design of All-Optical Slow Light TDM Structure Based on Photonic Crystals

Wu¹

2014

PIER

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Abstract-This work demonstrates an all-optical slow light Time Division Multiplexing (TDM) structure based on photonic crystals (PCs). The structure shows good ability of dividing time domain signal into repetition time slots signal by four tunable group velocity waveguides from 0.006 * c to 0.248 * c where c is the velocity of light in the vacuum at the center wavelength of 1550 nm and over a bandwidth 4.52 THz with group velocity dispersion below 10 2 ps 2 /km. New high efficiency Y-type directional coupling output can get larger than ∼1.4 times intensity and ∼93% loss improvement which are comparable to conventional output device. The proposed PCs waveguide structure is leading the way to achieve the TDM application and has good capability to extend the application of the optical communication and optical fiber sensors systems.

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Section: Time-division-multiplexer (Tdm) System Design Modelingmentioning

confidence: 99%

New Design of All-Optical Slow Light TDM Structure Based on Photonic Crystals

Wu¹

2014

PIER

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“…Others have investigated rib [1,2], groove [6], hollow core [7] and photonic crystal [8] waveguides based on silicon on insulator technology. This technology uses silicon manufacturing techniques that are also used for CMOS and therefore well established.…”

Section: Lc Waveguides and The Simulation Of Their Propertiesmentioning

confidence: 99%

“…This technology uses silicon manufacturing techniques that are also used for CMOS and therefore well established. The advantage of using high index silicon for the core [1,2,8] of the waveguide is that the light is very well confined to the core and that bends with a small radius are possible. In the past tunable ring resonators based on liquid crystal over silicon on insulator waveguides [1,2].…”

Section: Lc Waveguides and The Simulation Of Their Propertiesmentioning

confidence: 99%

Waveguides with liquid crystals

et al. 2011

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Nematic liquid crystals can switch the orientation of the director under influence of an electric field. Liquid crystals can be combined with waveguides in many different ways: the liquid crystal can be in the core, in the cladding or in both. In the recent past liquid crystals have been combined with glass fibers and with silicon-on-insulator waveguides. Important progress has been achieved in the modeling of liquid crystals near inhomogeneous boundaries and the modeling of optical waveguides with anisotropic materials. This paper discusses these recent advancements and illustrates how waveguides with voltage tuned cutoff may be designed.

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“…Several novel methods have been proposed to improve the slow light performance by tuning the structural parameters of line-defect waveguides and their neighborhood rows. Improvements include changing the width of the line defect [16,17], altering the position or radii of the air holes [18][19][20], employing ellipse air holes [21][22][23], eye-shape holes [24], PC with ring-shape holes [25][26][27], liquid infiltration into the air holes [28,29].…”

Section: Introductionmentioning

confidence: 99%

Slow light in ellipse-hole photonic crystal line-defect waveguide with high normalized delay bandwidth product

2014

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In this paper, a novel flatband slow light device with low group velocity dispersion (GVD) is presented in an ellipse-hole photonic crystal (PC) line-defect waveguide. Utilizing dispersion engineering in the proposed structure, normalized delay-bandwidth product (NDBP) under a constant group index criterion is significantly improved. A step-by-step optimization process is done on the adjacent rows to the waveguide, which are filled by silica. For optimum case a high NDBP of 0.461 with a group index of 41.86 and a bandwidth of 17.06 nm is obtained by three-dimensional plane-wave expansion method. To the best of our knowledge, this NDBP is one of the highest values in PC waveguides reported to date, in which the group index value is relatively high. The numerical results show that GVD is negligible over a broad wavelength range. Also, optical pulse propagation through the waveguide is performed based on the finite-difference time-domain method. The results indicate that the shape of output pulse experiences a broadening of 2.1% compared with the incoming pulse after traveling a distance of 30a.

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Slow Light Propagation in Liquid-Crystal Infiltrated Silicon-On-Insulator Photonic Crystal Channel Waveguides

Cited by 13 publications

References 47 publications

New Design of All-Optical Slow Light TDM Structure Based on Photonic Crystals

New Design of All-Optical Slow Light TDM Structure Based on Photonic Crystals

Waveguides with liquid crystals

Slow light in ellipse-hole photonic crystal line-defect waveguide with high normalized delay bandwidth product

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