Xu G. Y., Salvador A., Kim W., Fan Z., Lu C., Tang H., Morkoc H., Smith G., Estes
M., Goldenberg B., Yang W., Krishnankutty S., 1997, High speed, low noise ultraviolet
photodetectors based on GaN p-i-n and AlGaN(p)-GaN(i)-GaN(n) structures, Applied Physics
Letters, Vol. 71, No. 15, pp. 2154-2156