A III-nitride Layered Barrier Structure for Hyperspectral Imaging Applications


We report on a novel photodetector structure based on III-nitride materials. A layered configuration is used to create a barrier with voltage-tunable height. The barrier is used as a filter for photoexcited holes and electrons, and could form the basis for a dynamically tunable pixel in a hyperspectral imaging array. This would eliminate the need for external gratings and filters used in conventional hyperspectral instruments. In addition, the tunability of pixels allows a decrease of the array dimension by one. The III-nitride materials family is a good candidate for this device, combining large band offsets with the ability for epitaxial growth. We have demonstrated the feasibility of using III-nitride materials to fabricate layered tunnel barriers and have demonstrated tunability of photodetection using these structures. External quantum efficiencies of > 12% have been achieved with prototype devices.

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  1. 1

    A.J. Fischer, A.A. Allerman, M.H. Crawford, K.H.A. Bogart, S.R. Lee, R.J. Kapler, W.W. Chow, S.R. Kurtz, K.W. Fullmer, J.J. Figiel, Appl. Phys. Lett. 84, 3394 (2004).

    CAS  Article  Google Scholar 

  2. 2

    K.S. Ramaiah, Y.K. Su, S.J. Chang, B. Kerr, H.P. Liu, I.G. Chen, Appl. Phys. Lett. 84, 3307 (2004).

    CAS  Article  Google Scholar 

  3. 3

    G.Y. Zhang, Z.J. Yang, Y.Z. Tong, Z.X. Qin, X.D. Hu, Z.Z. Chen, X.M. Ding, M. Lu, Z.H. Li, T.J. Yu, L. Zhang, Z.Z. Gan, Y. Zhao, C.F. Yang, Optical Materials 23, 183 (2003).

    CAS  Article  Google Scholar 

  4. 4

    C.H. Liu, Y.K. Su, T.C. Wen, S.J. Chang, R.W. Chang, J. Crystal Growth, 254, 336 (2003).

    CAS  Article  Google Scholar 

  5. 5

    S. Figge, J. Dennemarck, G. Alexe, D. Hommel, Mater. Res. Soc. Symp. Proc. 831, E11.36 (2005).

    Article  Google Scholar 

  6. 6

    B. Potì, M. T. Todaro, M. C. Frassanito, A. Pomarico, A. Passaseo, M. Lomascolo, R. Cingolani, and M. De Vittorio, Electron. Lett. 39, 1747 (2003).

    Article  Google Scholar 

  7. 7

    M. Fieger, Y. Dikme, F. Jessen, H. Kalish, A. Noculak, A. Szymakowski, P. Gemmern, B. Faure, C. Richtarch, F. Letertre, M. Heuken, and R. H. Jensen, Phys. Stat. Sol. (c) 2, 2607 (2005).

    CAS  Article  Google Scholar 

  8. 8

    J. S. Pearlman, P. S. Barry, C. C. Segal, J. Shepanski, D. Beiso, and S. L. Carman, IEEE Trans. Geosci. Rem. Sens. 41, 1160 (2003).

    Article  Google Scholar 

  9. 9

    R. Marion, R. Michel, and C. Faye, IEEE Trans. Geosci. Rem. Sens. 42, 854 (2004).

    Article  Google Scholar 

  10. 10

    K. K. Likharev, Appl. Phys. Lett. 73, 2137 (1998).

    CAS  Article  Google Scholar 

  11. 11

    J.D. Casperson, L.D. Bell and H.A. Atwater, J. Appl. Phys. 92, 261 (2002).

    CAS  Article  Google Scholar 

  12. 12

    T. Fujii, K. Shimomoto, R. Ohba, Y. Toyoshima, K. Horiba, J. Ohta, H. Fujioka, M. Oshima, S. Ueda, H. Yoshikawa, and Keisuke Kobayashi, Applied Physics Express 2, 011002 (2009).

    Article  Google Scholar 

  13. 13

    N. Tripathi, J. R. Grandusky, V. Jindal, F. Shahedipour-Sandvik, and L. D. Bell, Appl. Phys. Lett. 90, 231103 (2007).

    Article  Google Scholar 

  14. 14

    G. Martin, A. Botchkarev, A. Rockett and H. Morkoc, Appl. Phys. Lett. 68, 2541 (1996).

    CAS  Article  Google Scholar 

  15. 15

    A. Floro, D. M. Follstaedt, P. Provencio, S. J. Hearne, and S. R. Lee, J. Appl. Phys. 96, 7087 (2004).

    CAS  Article  Google Scholar 

  16. 16

    S. R. Lee, D. D. Koleske, K. C. Cross, J. A. Floro, K. E. Waldrip, A. T. Wise, and S. Mahajan, Appl. Phys. Lett. 85, 6164 (2004).

    CAS  Article  Google Scholar 

  17. 17

    J. C. Brewer, R. J. Walters, L. D. Bell, D. B. Farmer, R. G. Gordon and H. A. Atwater, Appl. Phys. Lett. 85, 4133 (2004).

    CAS  Article  Google Scholar 

  18. 18

    L. S. Yu, Q. J. Xing, D. Qiao, S. S. Lau, K. S. Boutros and J. M. Redwing, Appl. Phys. Lett. 73, 3917 (1998).

    CAS  Article  Google Scholar 

  19. 19

    R. J. Powell, J. Appl. Phys. 41, 2424 (1970).

    CAS  Article  Google Scholar 

  20. 20

    L. D. Bell, R. P. Smith, B. T. McDermott, E. R. Gertner, R. Pittman, R. L. Pierson, and G. J. Sullivan, Appl. Phys. Lett. 76, 1725 (2000).

    CAS  Article  Google Scholar 

  21. 21

    E. O. Kane, Phys. Rev. 127, 131 (1962).

    CAS  Article  Google Scholar 

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Bell, L.D., Tripathi, N., Grandusky, J.R. et al. A III-nitride Layered Barrier Structure for Hyperspectral Imaging Applications. MRS Online Proceedings Library 1167, 603 (2009). https://doi.org/10.1557/PROC-1167-O06-03

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