Study of Nonequilibrium Electron Relaxaton in Metal Particle-Matrix Composite Thin Films

吴锦雷; 王传敏

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Study of Nonequilibrium Electron Relaxaton in Metal Particle-Matrix Composite Thin Films

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- Study of Nonequilibrium Electron Relaxaton in Metal Particle-Matrix Composite Thin Films
- Acta Electronica Sinica Issue 11, Pages: 37-41(1998)
- 作者机构：
  
  1. 北京大学电子学系!北京
  2. 100871
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN24
- Published：1998
- 稿件说明：
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[1]吴锦雷,王传敏.金属粒子-介质复合薄膜中非平衡态电子瞬态弛豫的研究[J].电子学报,1998(11):37-41.

吴锦雷, 王传敏. Study of Nonequilibrium Electron Relaxaton in Metal Particle-Matrix Composite Thin Films[J]. Acta Electronica Sinica, 1998, (11): 37-41.
[1]吴锦雷,王传敏.金属粒子-介质复合薄膜中非平衡态电子瞬态弛豫的研究[J].电子学报,1998(11):37-41. DOI：

吴锦雷, 王传敏. Study of Nonequilibrium Electron Relaxaton in Metal Particle-Matrix Composite Thin Films[J]. Acta Electronica Sinica, 1998, (11): 37-41. DOI：

摘要

利用飞秒脉冲激光和泵浦．探测技术测量了贵金属-介质复合薄膜（Cu-Ba-O、An-Ba-O）的瞬态光学透过率随延迟时间的变化曲线，观察到了薄膜对光的吸收迅速增大并在皮秒时间内恢复原状的现象该现象是薄膜中金属超微粒子内费米能级附近电子被飞秒激光脉冲激发，产生非平衡态电子而经历瞬态弛豫造成的本文从理论上给出了复合薄膜中Au超微粒子的电子声子相互作用常数g的数值

Abstract

The femtosecond laser pulses and pump-probe method were used for measuring thetransient change of optical transmissivity of noble metal particle-matrix commpite thin films （Cu-Ba-O

An-Ba-O）. It is observed that the optical absorption in the thin films rapidly increases and then recoversin a few picaseconds. optical relaxation is a process in which nonequilibrium electrons

form metallic ultrafine particles

excited by laser pulses

return to the equilibrium state. the theoretical value of electronphonon coupling constant g of An ultra fine particles in the composite thin film is got.

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