Skip to main content Accessibility help

Effects of Spacer Thickness on the Performance of InGaAs/GaAs Quantum Dot Lasers

  • Nien-Tze Yeh (a1), Wei-Shen Liu (a1), Shu-Han Chen (a1) and Jen-Inn Chyi (a1)


It is found that the performance of self-assembled In0.5Ga0.5As/GaAs multi-stack quantum dot lasers is sensitive to the GaAs spacer thickness between the dots. Reducing the spacer thickness from 30 nm to 10 nm leads to narrow photoluminescence linewidth, low threshold current, high characteristic temperature and high internal quantum efficiency. This behavior is attributed to inhomogeneous broadening caused by dot size fluctuation related to spacer thickness.



Hide All
1. Arakawa, Y., and Sakaki, H., Appl. Phys. Lett., 40, 3941 (1982).
2. Kirstaedter, N., Ledentsov, N. N., Grundmann, M., Bimberg, D., Ustinov, V. M., Ruvimov, S. S., Maximov, M. V., Kop'ev, P. S., and Alferov, Zh. I., Electron. Lett., 30, 14161417 (1994).
3. Shoji, H., Nakata, Y., Mukai, K., Sugiyama, Y., Sugawara, M., Yokoyama, N., and Ishikawa, H., Electron. Lett., 32, 20232024 (1996).
4. Liu, G. T., Stintz, A., Li, H., Malloy, K. J., and Lester, L. F., Electron. Lett., 35, 11631164 (1999).
5. Maksimov, M. V., Gordeev, N. Yu., Zatsev, S. V., Kop'ev, P. S., Kochnev, I. V., Ledentsov, N. N., Lunev, A. V., Ruvimov, S. S., Sakharov, A. V., Tsatsul'nikov, A. F., Shernyakov, Yu. M., Alferov, Zh. I., and Bimberg, D., Semiconductors, 31, 124126 (1997).
6. Xie, Q., Madhukar, A., Chen, P., and Kobayashi, N. P., Phys. Rev. Lett., 75, 25422545 (1995).
7. Nee, T.-E., Yeh, N.-T., Shiao, P.-W., Chyi, J.-I., and Lee, C. T., Jpn. J. Appl. Phys., 38, 650652 (1999).
8. Chyi, J.-I., Nee, T.-E., Lee, C.-T., Shieh, J.-L., and Pan, J.-W., J. Crystal Growth., 175/176, 777780 (1997).
9. Zhang, Y. W., Xu, S. J., and Chiu, C.-H., Appl. Phys. Lett., 74, 18091811 (1999).
10. Binsma, J.J.M., Thijs, P.J.A., Dongen, T. van, Sander-Jochem, M.J.H., and Slootweg, R.W.M., Sixth International Conference on Indium Phosphide and Related Materials, Netherlands, 1013(1994).
11. Williams, P.J., Robbins, D.J., Cush, R., Scott, M.D., Davies, J.I., Marshall, A.C., Riffat, J., Carter, A.C., Electron. Lett., 24, 859860 (1998).


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed