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Lasing in Thue–Morse structures with optimized aperiodicity
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10.1063/1.3592850
/content/aip/journal/apl/98/20/10.1063/1.3592850
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/20/10.1063/1.3592850
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

[(a) and (b)] Top-view scanning electron microscope (SEM) images of parts of Th–Mo patterns fabricated in a GaAs membrane. Air holes of radii and are arranged in 2D Th–Mo sequence. and in (a) and 87 nm in (b). The scale bar is . [(c) and (d)] Reciprocal space representations of the structures (a) and (b) obtained by Fourier transform of the SEM images. Besides the primary peaks that correspond to the square lattice, there are many secondary peaks due to structural aperiodicity, which become weaker as approaches .

Image of FIG. 2.
FIG. 2.

(a) Emission spectra taken at the incident pump power . (b) Measured intensity (black circle) and spectral width (blue square) of one emission peak at wavelength vs showing the onset of lasing at . The solid lines are linear fitting of peak intensity below and above the threshold pump power .

Image of FIG. 3.
FIG. 3.

(a) Calculated values of the highest- modes for each . Different symbols represent different types of modes, e.g., square for type I, triangle for type II, and circle for type III. (b) factor as a function of for type II (black curve) and III (blue dashed curve) modes. (c) Spatial distribution of magnetic field for type I, II, and III modes (from left to right). Type II becomes the overall maximal- mode at .

Image of FIG. 4.
FIG. 4.

(a) Calculated and for the highest- modes vs . becomes maximal at while increases monotonically with . (b) Lateral size of the highest- mode and percentage of the continuous background in the spatial Fourier spectra of the Th–Mo structures as a function of . is minimal near the optimal value of where is maximal. decreases monotonously as increases.

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/content/aip/journal/apl/98/20/10.1063/1.3592850
2011-05-19
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Lasing in Thue–Morse structures with optimized aperiodicity
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/20/10.1063/1.3592850
10.1063/1.3592850
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