Analysis of gain saturation in In0.02Ga0.98N/In0.16Ga0.84N multiple quantum wells

A way of analyzing the data in a variable stripe length method gain experiment is presented. We confirm that the stripe length dependence of the gain in In0.02Ga0.98N/In0.16Ga0.84N multiple quantum wells is caused by the change of the chemical potential along the excited stripe due to the interaction of the carrier and photon densities, and the gain threshold density is estimated. A trial function assuming a Lorentzian line shape for the stripe length dependence of the gain is compared with the edge emission intensity as a function of the stripe length. This is found to fit very well with our data, even beyond the saturation region.

[1]  Shuji Nakamura,et al.  Dynamics of optical gain in InxGa1−xN multi-quantum-well-based laser diodes , 2000 .

[2]  Shuji Nakamura,et al.  Dimensionality of excitons in laser-diode structures composed of In x Ga 1-x N multiple quantum wells , 1999 .

[3]  G. Mohs,et al.  On the gain mechanism in GaN based laser diodes , 1998 .

[4]  Masahiko Sano,et al.  CONTINUOUS-WAVE OPERATION OF INGAN/GAN/ALGAN-BASED LASER DIODES GROWN ON GAN SUBSTRATES , 1998 .

[5]  N. A. Gun’ko,et al.  Theoretical study of the threshold characteristics of InGaN multiquantum well lasers , 1998 .

[6]  M. Heuken,et al.  Saturation of optical gain in ZnSe heterostructures , 1998 .

[7]  G. Mohs,et al.  Failure of the modal gain model in a GaN based laser diode , 1997 .

[8]  Shuji Nakamura,et al.  Recombination dynamics of localized excitons in In 0.20 Ga 0.80 N- In 0.05 Ga 0.95 N multiple quantum wells , 1997 .

[9]  Stephan W Koch,et al.  Physics of Optoelectronic Devices , 1995 .

[10]  S. Nakamura,et al.  High-Brightness InGaN Blue, Green and Yellow Light-Emitting Diodes with Quantum Well Structures , 1995 .

[11]  Y. Dankner.  Optical gain and saturation of photoexcited type-II superlattice , 1995 .

[12]  Stephan W Koch,et al.  Quantum theory of the optical and electronic properties of semiconductors, fifth edition , 2009 .

[13]  R. E. Nahory,et al.  Optical gain in semiconductors , 1973 .

[14]  W. W. Rigrod,et al.  Gain Saturation and Output Power of Optical Masers , 1963 .