| http://www.w3.org/ns/prov#value | - An active medium filling the point defect can be selected from the group including materials having multiquantum well structure or multiquantum dot structure, such as system of InGaAsP, AlGaAs, AlGaInP, AlGaN, InGaN, ZnSe, and ZnS or organic materials depending on a desirable oscillation wavelength.
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