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Stimulated emission from ZnO thin films with high optical gain and low loss

Abstract : Stimulated surface- and edge-emissions were investigated for ZnO thin films grown epitaxially by pulsed laser deposition. The lasing threshold was 0.32 MW/cm2 for surface pumping and 0.5 MW/cm2 for edge pumping, which is significantly lower than thresholds observed previously. A modified variable stripe length method was used to measure the gain, which was 1369 cm−1 for the N-band emission. Losses were measured using the shifting excitation spot method and values of 6.2 cm−1 and 6.3 cm−1 were found for the N-band and P-band, respectively. The measured gain and loss were the highest and lowest (respectively) ever reported for ZnO films.
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https://hal-utt.archives-ouvertes.fr/hal-02448866
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Submitted on : Wednesday, January 22, 2020 - 3:23:30 PM
Last modification on : Monday, July 13, 2020 - 2:10:04 PM

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Abdel-Sattar Gadallah, Komla Nomenyo, Christophe Couteau, Dave J. Rogers, Gilles Lerondel. Stimulated emission from ZnO thin films with high optical gain and low loss. Applied Physics Letters, American Institute of Physics, 2013, 102 (17), pp.171105. ⟨10.1063/1.4803081⟩. ⟨hal-02448866⟩

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