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Investigation of whispering gallery mode dependence on cavity geometry of quasiperiodic photonic crystal microcavity lasers
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10.1063/1.2402894
/content/aip/journal/apl/89/23/10.1063/1.2402894
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/23/10.1063/1.2402894

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Main resonance mode, WGM, with azumithal number 6 (W6 mode) is calculated by 2D FDTD method. Other resonance modes (W3, W4, and W5) near the W6 mode in spectrum are also calculated. (b) Top view and tilted view SEM pictures of a typical DQPC D2 microcavity. The fabricated lattice constant and airhole radius are 600 and .

Image of FIG. 2.
FIG. 2.

(Color online) (a) Typical L-L curves of DQPC and triangular PC D2 microcavity lasers. The thresholds of DQPC and PC D2 lasers can be estimated as 0.15 and at similar lasing wavelengths. (b) Typical lasing spectrum of DQPC D2 microcavity laser. The lasing wavelength is and its FWHM is .

Image of FIG. 3.
FIG. 3.

(Color online) (a) Illustration of two variation regions, the 12 nearest airholes (denoted by red circles, region A) and the outer airholes (denoted by blue circles, region B) in DQPC D2 microcavity. The mode distortions of these two cases with the same variation degree of 5% are also shown. (b) Lasing spectra of devices with different variation degrees in regions A and B. Lasing wavelength variations for the region-A and -B cases are 19 and .

Image of FIG. 4.
FIG. 4.

(Color online) WGM in triangular PC D2 microcavity shows the mismatch between the mode profile and the cavity boundary. Well-confined WGM is sustained in modified PC D2 microcavity by shifting six nearest airholes outward to form a circular cavity boundary.

Tables

Generic image for table
Table I.

Observed lasing actions of DQPC D2 microcavity lasers with different variation regions and degrees. The sampling devices are over 300.

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/content/aip/journal/apl/89/23/10.1063/1.2402894
2006-12-06
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Investigation of whispering gallery mode dependence on cavity geometry of quasiperiodic photonic crystal microcavity lasers
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/23/10.1063/1.2402894
10.1063/1.2402894
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