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Behaviors of Emission Wavelength Shift in AlInGaN-Based Green Laser Diodes

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12 Author(s)
Lee, Sung-Nam ; Corp. R&D Inst., Samsung Electro-Mech. Co., Ltd., Suwon ; Ryu, H.Y. ; Paek, H.S. ; Son, J.K.
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InGaN quantum-well (QW) green laser diodes (LDs) with an emission wavelength of 483.7 nm were characterized by controlling the injection pulsewidth. The emission wavelength of LDs showed a large blueshift (> 20 nm) of spontaneous emission peak with increasing injection current below the threshold current. The huge blueshift was ascribed to the deep In localization states and the strong piezoelectric field in the green InGaN QW structure with higher In contents than conventional violet/blue InGaN QWs. However, the lasing wavelength of LDs was slightly redshifted by increasing the injection pulsewidth due to the thermal heating effects.

Published in:

Electron Device Letters, IEEE  (Volume:29 ,  Issue: 8 )