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- W2112574315 abstract "We investigate lasing properties of a line-defect-waveguide laser formed in 2D photonic crystal slab. It is shown that a very wide tuning (-150nm) of lasing wavelength can be achieved by changing the waveguide width slightly. A LDW was formed in a triangular-lattice 2D PC slab (lattice-constant a=0.42pm) with the total size of 3.6pm x 13.6pm for F-X and T-J (or waveguide) directions, respectively, as shown in Fig.2 (a). Seven LDW lasers with different waveguide widths from 0.71pm (=1.68a) to 0.78pm (=1.85a) were fabricated. The width is defined as the distance between centers of two parallel rows of air holes surrounding the waveguide shown in Fig.2 (a). The LDW lasers have successfully lased at RT with optical pump. Lasing spectra for the devices with the widths of 0.71pm (=1.71a) and 0.76pm (=1.81a), which correspond to the devices in Fig.2 (a), are shown in Fig.2 (b). Fig.3 summarizes the lasing wavelength as a function of the LDW width. Oscillation wavelength increases almost linearly with increasing LDW width, whose slope is expressed approximately as 80nd0.1 a. It indicates that only 10% change of lattice-constant a in the LDW width gives an extremely large change of 80nm in lasing wavelength. This is in good agreement of the theoretical prediction. 4. Summary We have demonstrated successfully ultra wide spectral range tunability (80nm/O.la) of LDW lasers by the slight change in waveguide width. This indicates that the LDW lasers can be applied to ultra small multi-channel edge-emitting laser arrays and/or an ultra small tunable laser." @default.
- W2112574315 created "2016-06-24" @default.
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- W2112574315 date "2003-06-06" @default.
- W2112574315 modified "2023-09-25" @default.
- W2112574315 title "Line-defect-waveguide-laser in 2d photonic crystal slab" @default.
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