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Slow-light enhancement of radiation pressure in an omnidirectional-reflector waveguide
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color) (a) Omnidirectional-reflector waveguide structure: Two multilayer films of period are separated by a distance ; each film is composed of alternating layers with refractive indices and . Guided modes propagate in the air region between the films in the direction indicated by the wave vector . The field profile of the fundamental mode is superimposed on the figure. (b) Dispersion relation for the structure shown in (a) for modes with . The high- and low-index layer thicknesses were taken to satisfy the quarter-wave condition for and . Shaded grey regions indicate bulk modes of the multilayer film, and colored symbols indicate the dispersion relation for the fundamental mode of the waveguide for several different values of .

Image of FIG. 2.
FIG. 2.

(Color) (a) Force between the multilayer films resulting from light travelling through the waveguide. Plotted is the dimensionless quantity as a function of the dimensionless quantity , where is the force due to area , is the electromagnetic field energy contained in a slice of the waveguide that intersects the axis in area , and is the waveguide mode frequency. (b) Maximum force from (a) as a function of . The peak in the curve gives the maximum attainable force for fixed separation of the films and energy in the fields , where the maximization is over the period of the films and the frequency .

Image of FIG. 3.
FIG. 3.

(Color) (a) Force as a function of separation between the films, for fixed operating frequency and electromagnetic field energy. As is decreased to , the group velocity of the waveguide mode decreases to zero, shown as the dimensionless quantity . (b) Force as a function of separation between the plates, for fixed operating frequency and waveguide input power. As is decreased to , the force goes to infinity. (c) A possible geometry for achieving constant input power over a range of separations.


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Scitation: Slow-light enhancement of radiation pressure in an omnidirectional-reflector waveguide