Space-charge electric field in photorefractive multiple quantum wells

作者：Zhang, Xiangxue^*; Samiullah, Mohammad; Yu, Ping

来源：Applied Physics Letters, 2010, 96(15): 152106.

DOI：10.1063/1.3367728

• aluminium compounds
• gallium arsenide
• III-V semiconductors
• optical modulation
• photoconductivity
• photorefractive materials
• semiconductor quantum wells
• space charge

We have developed a graphical method to determine the space-charge electric field in photorefractive multiple quantum wells when the photocurrent is dominated by the drift current. The minima and maxima of the space-charge electric field due to space modulated light intensity are obtained from photocurrent measurements under uniform illumination. In addition, we find that the space-charge field depends nonlinearly on the applied electric field and the intensity of light, and changes sharply with the intensity up to a critical intensity beyond which it remains unchanged.

• 出版日期2010-4-12
• 单位北京林业大学