Laser Induced Nanostructure Formation on a surface of CdZnTe Crystal

作者：Medvid A^*; Mychko A; Pludons A; Naseka Yu

来源：Journal of Nano Research, 2010, 11: 107-112.

DOI：10.4028/www.scientific.net/JNanoR.11.107

• Self-organizing nanostructure
• Nd:YAG laser
• Exciton quantum confinement effect
• CdZnTe crystal

For the first time, a new PL band at 1.8718 eV is observed after irradiation of Cd(1-x)Zn(x)Te (x = 0.1) crystal by Nd:YAG laser at intensity 12.0 MW/cm(2). The origin of this PL band we connect with formation of strongly enriched layer by Zn atoms at the irradiated surface of the sample due to a themogradient effect. Self-organizing structures of nanometer size are observed on the surface of a CdZnTe crystal (x = 0.1) irradiated by strongly absorbed Nd:YAG laser radiation at intensities 4.0-12.0 MW/cm(2). The effect of exciton quantum confinement manifested by a shift to higher energies of the A(0),X exciton line in the photoluminescent spectrum is present in structures of 10-15 nm in diameter at the top of nanohills. A graded band gap structure with optical window is formed on the top of nanohills.

• 出版日期2010