SCHOTTKY-BARRIER PHOTODETECTORS BASED ON ALGAN

We report solar-blind AlxGa1-xN photovoltaic detectors with cutoff wav elengths as short as 290 nm. Mesa geometry devices of different active areas are fabricated and characterized for spectral responsitivity, s peed, and noise performance. The responsivity of the devices near the cutoff wavelength is 0.07 A/W. The detector noise is found to be 1/f l imited, with a noise equivalent power of 6.6 x 10(-9) W over the total response bandwidth of 100 kHz. (C) 1998 American Institute of Physics .