Systematic Design of Slow Light Waveguides

Publication: ResearchPh.D. thesis – Annual report year: 2012

Standard

Systematic Design of Slow Light Waveguides. / Wang, Fengwen; Jensen, Jakob Søndergaard (Supervisor); Sigmund, Ole (Supervisor); Mørk, Jesper (Supervisor).

Kgs.Lyngby : DTU Mechanical Engineering, 2012. 166 p. (DCAMM Special Report; No. S145).

Publication: ResearchPh.D. thesis – Annual report year: 2012

Harvard

Wang, F, Jensen, JS, Sigmund, O & Mørk, J 2012, Systematic Design of Slow Light Waveguides. Ph.D. thesis, DTU Mechanical Engineering, Kgs.Lyngby. DCAMM Special Report, no. S145

APA

Wang, F., Jensen, J. S., Sigmund, O., & Mørk, J. (2012). Systematic Design of Slow Light Waveguides. Kgs.Lyngby: DTU Mechanical Engineering. (DCAMM Special Report; No. S145).

CBE

Wang F, Jensen JS, Sigmund O, Mørk J 2012. Systematic Design of Slow Light Waveguides. Kgs.Lyngby: DTU Mechanical Engineering. 166 p. (DCAMM Special Report; No. S145).

MLA

Wang, Fengwen et al. Systematic Design of Slow Light Waveguides Kgs.Lyngby: DTU Mechanical Engineering. 2012. (DCAMM Special Report; Journal number S145).

Vancouver

Wang F, Jensen JS, Sigmund O, Mørk J. Systematic Design of Slow Light Waveguides. Kgs.Lyngby: DTU Mechanical Engineering, 2012. 166 p. (DCAMM Special Report; No. S145).

Author

Wang, Fengwen; Jensen, Jakob Søndergaard (Supervisor); Sigmund, Ole (Supervisor); Mørk, Jesper (Supervisor) / Systematic Design of Slow Light Waveguides.

Kgs.Lyngby : DTU Mechanical Engineering, 2012. 166 p. (DCAMM Special Report; No. S145).

Publication: ResearchPh.D. thesis – Annual report year: 2012

Bibtex

@book{4ff3d93132c645c2a0ede31ef4e7b9bd,
title = "Systematic Design of Slow Light Waveguides",
publisher = "DTU Mechanical Engineering",
author = "Fengwen Wang and Jensen, {Jakob Søndergaard} and Ole Sigmund and Jesper Mørk",
year = "2012",
isbn = "978-87-90416-85-0",
series = "DCAMM Special Report",

}

RIS

TY - BOOK

T1 - Systematic Design of Slow Light Waveguides

A1 - Wang,Fengwen

AU - Wang,Fengwen

A2 - Jensen,Jakob Søndergaard

A2 - Sigmund,Ole

A2 - Mørk,Jesper

ED - Jensen,Jakob Søndergaard

ED - Sigmund,Ole

ED - Mørk,Jesper

PB - DTU Mechanical Engineering

PY - 2012

Y1 - 2012

N2 - Light can propagate much slower in photonic crystal waveguides and plasmonic<br/>waveguides than in vacuum. Slow light propagation in waveguides shows broad<br/>prospects in the terabit communication systems. However, it causes severe signal<br/>distortions and displays large propagation loss. Moreover it is vulnerable to manufacturing disorders. This thesis aims to design novel waveguides to alleviate signal distortions and propagation loss using optimization methodologies, and to explore the design robustness with respect to manufacturing imperfections.<br/>To alleviate the signal distortions in waveguides, an optimization formulation<br/>is presented to tailor the slope of the dispersion curve. The design robustness<br/>is enforced by considering different manufacturing realizations in the optimization<br/>procedure. Both free- and fixed-topology (circular-hole based) slow light photonic crystal waveguides are obtained using two different parameterizations. Detailed comparisons show that the bandwidth of slow light propagation can be significantly enhanced by allowing irregular geometries in the waveguides.<br/>To mitigate the propagation loss due to scattering in the photonic crystal waveg-<br/>uides, an optimization problem is formulated to minimize the average propagation loss of the designed modes. The presented approach is employed to design a free-topology slow light waveguide. Numerical result illustrates that slow light propagation in the optimized waveguide displays significantly suppressed propagation loss while keeping the same bandwidth.<br/>The first optimization formulation is further employed to design slow light metal-<br/>dielectric-metal plasmonic waveguides. It is shown that dispersionless slow light<br/>propagation is achieved in the optimized plasmonic waveguide. Further study reveals that the loss in metal can be compensated by integrating gain media in the optimized waveguide, while keeping negligible signal distortions.

AB - Light can propagate much slower in photonic crystal waveguides and plasmonic<br/>waveguides than in vacuum. Slow light propagation in waveguides shows broad<br/>prospects in the terabit communication systems. However, it causes severe signal<br/>distortions and displays large propagation loss. Moreover it is vulnerable to manufacturing disorders. This thesis aims to design novel waveguides to alleviate signal distortions and propagation loss using optimization methodologies, and to explore the design robustness with respect to manufacturing imperfections.<br/>To alleviate the signal distortions in waveguides, an optimization formulation<br/>is presented to tailor the slope of the dispersion curve. The design robustness<br/>is enforced by considering different manufacturing realizations in the optimization<br/>procedure. Both free- and fixed-topology (circular-hole based) slow light photonic crystal waveguides are obtained using two different parameterizations. Detailed comparisons show that the bandwidth of slow light propagation can be significantly enhanced by allowing irregular geometries in the waveguides.<br/>To mitigate the propagation loss due to scattering in the photonic crystal waveg-<br/>uides, an optimization problem is formulated to minimize the average propagation loss of the designed modes. The presented approach is employed to design a free-topology slow light waveguide. Numerical result illustrates that slow light propagation in the optimized waveguide displays significantly suppressed propagation loss while keeping the same bandwidth.<br/>The first optimization formulation is further employed to design slow light metal-<br/>dielectric-metal plasmonic waveguides. It is shown that dispersionless slow light<br/>propagation is achieved in the optimized plasmonic waveguide. Further study reveals that the loss in metal can be compensated by integrating gain media in the optimized waveguide, while keeping negligible signal distortions.

BT - Systematic Design of Slow Light Waveguides

SN - 978-87-90416-85-0

T3 - DCAMM Special Report

T3 - en_GB

ER -