Abstract
Transformation of broadband emission of oxygen defects in the carcass of ZnO-inverted opal into a multiple- mode amplified spontaneous emission band has been observed in the spectral interval of a photonic bandgap upon increasing excitation intensity. The mode structure has been assigned to amplification of emission coupled to resonance modes of the self-selected distributed Bragg resonator. The surprisingly low 2 W/cm2onset of amplification has been explained by the long radiative decay time of defect states populated according to the three-level excitation scheme. The decrease of emission intensity between amplified peaks has been associated with the saturation of the ZnO defect emission.
Original language | English (US) |
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Pages (from-to) | 1519-1521 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 34 |
Issue number | 10 |
DOIs | |
State | Published - May 15 2009 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics