Hot electron tunneling in femtosecond laser-assisted scanning tunneling microscopy

被引：15

作者：

Merschdorf, M ^{[1
]}

Pfeiffer, W ^{[1
]}

Thon, A ^{[1
]}

Gerber, G ^{[1
]}

机构：

[1] Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 02期

关键词：

D O I：

10.1063/1.1491280

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The combination of scanning tunneling microscopy with femtosecond laser spectroscopy yields simultaneously ultimate spatial and temporal resolution. One possibility to realize this combination is the direct excitation of the tunnel junction in a pump-probe configuration and the detection of a tunnel current component that depends nonlinearly on the laser intensity. The laser-induced signal is expected to be very small, therefore a suitable sample material and a modulation technique is required. In measurements on a GaP(100) surface evidence for tunneling of hot electrons is obtained giving the possibility for local time-resolved tunneling spectroscopy. (C) 2002 American Institute of Physics.

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页码：286 / 288

页数：3

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