A study of random laser modes in disordered photonic crystals

Details A study of random laser modes in disordered photonic crystals A study of random laser modes in disordered photonic crystals

2002-09-30

arxiv.org/abs/cond-mat/0209680v1

Phys. Rev. A 69, 031803 (2004)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 figures

Scientific paper

10.1103/PhysRevA.69.031803

We studied lasing modes in a disordered photonic crystal. The scaling of the lasing threshold with the system size depends on the strength of disorder. For sufficiently large size, the minimum of the lasing threshold occurs at some finite value of disorder strength. The highest random cavity quality factor was comparable to that of an intentionally introduced single defect. At the minimum, the lasing threshold showed a super-exponential decrease with the size of the system. We explain it through a migration of the lasing mode frequencies toward the photonic bandgap center, where the localization length takes the minimum value. Random lasers with exponentially low thresholds are predicted.

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