ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Room-temperature continuous-wave (cw) operation is achieved in the MBE (molecular-beam epitaxy)-grown InGaP/InGaAlP double-heterostructure (DH) visible laser diodes with a threshold current of 110 mA. The lasing wavelength and threshold current density under pulsed operation are 666 nm and as low as 3.9 kA/cm2, respectively. This result is achieved by the introduction of H2 into the growth chamber during growth, the continuous growth from one layer to the next layer, and the introduction of a GaAs buffer layer. InGaP/InGaAlP quantum well structures are also grown. From photoluminescence measurements, the conduction-band discontinuity ΔEc is estimated to be 0.43 of the band-gap difference ΔEg. Furthermore, the multiquantum-well (MQW) structure is found to be stable under thermal treatment at temperatures as high as 750 °C. Room-temperature pulsed operation of InGaP/InGaAlP MQW laser diodes is achieved for the first time. The lasing wavelength is 658 nm with a threshold current density of 7.6 kA/cm2. cw operation is also achieved in the MQW laser diodes at −125 °C.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.338067
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