Enhancement of laser ablation yield by two color excitation |
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| Authors: | S. Zoppel R. Merz J. Zehetner G.A. Reider |
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| Affiliation: | (1) Department of Information and Communications, Kwangju Institute of Science and Technology, Gwangju, 500-712, Korea;(2) School of Electrical and Computer Engineering, Ajou University, Suwon, 442-749, Korea |
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| Abstract: | This work studied the implementation of multi-wavelength laser diodes on a single substrate through the position-dependent bandgap modification of the In0.2Ga0.8As/ GaAs multiple quantum wells (MQWs) by impurity-free vacancy disordering (IFVD). The position-dependent bandgap modification is achieved by performing the IFVD with SiOx capping layers with different stoichiometries. The lasing wavelength difference of about 31 nm was obtained between the ridge-waveguide laser diodes fabricated with the MQWs that had undergone the same thermal treatments using the SiOx film provided with SiH4 flow rates of 20 and 300 sccm. The device performance was not appreciably degraded in the laser diodes fabricated with the MQWs that had undergone the IFVD process . PACS 68.65.Fg; 78.55.-m; 42.55.Px |
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