LINEAR AND NONLINEAR TRANSMISSION OF CUXS QUANTUM DOTS

2020-04-05 18:48:41

samples NCS Moscow Inst CuxS

责任者: KLIMOV, V;BOLIVAR, PH;KURZ, H;KARAVANSKII, V;KRASOVSKII, V;KORKISHKO, Y 单位: MOSCOW GEN PHYS INST,MOSCOW 117942,RUSSIA.;MOSCOW INST ELECTR TECHNOL,MOSCOW 103498,RUSSIA. 来源出处: APPLIED PHYSICS LETTERS, v 67, JUL 31 1995, p 653- 655 摘要: CuxS nanocrystals (NCs) are reported. The samples are prepared by a CdS-to-CuxS chemical conversion from the glasses originally containing CdS NCs. A room-temperature linear absorption of the converted samples shows several well resolved peaks with spectral positions from red to blue. These spectral features are explained by size quantization within CuxS NCs (similar to 4 nm radius) with different copper deficiency [x is in the range from 1.8 (digenite) to 2 (chalcosite)]. A strong bleaching of the samples with a 3-ns relaxation is observed in the pump-probe measurements. A high value of the third-order nonlinear susceptibility (similar to 10(-7) esu) is derived from the nonlinear transmission spectra. (C) 1995 American Institute of Physics. 关键词: NHS NANOGOLD; PEPTIDE RECEPTORS; NEUROPEPTIDES; GOLD LABELING; NONRADIOACTIVE METHOD; RAT NONRADIOACTIVE METHOD; RAT; MICROCRYSTALLITES