Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Ultrafast, dynamical imaging of surfaces by use of a scanning tunneling microscope with a photoexcited, low-temperature-grown GaAs tip

Not Accessible

Your library or personal account may give you access

Abstract

We demonstrate ultrafast dynamical imaging of surfaces, using a scanning tunneling microscope with a low-temperature-grown GaAs tip photoexcited by 100-fs, 800-nm pulses. We use this setup to detect picosecond transients on a coplanar stripline and demonstrate a temporal resolution (full width at half-maximum) of 1.7 ps. The temporal waveform resulting from our low-temperature-grown GaAs tip is compared with waveforms obtained by means of photoconductively gated metal tips in the same setup. By dynamically imaging the stripline we demonstrate that the local conductivity in the sample is reflected in the transient correlated current and that 20-nm spatial resolution is achievable for a 2-ps transient correlated signal. Finally, we report the characterization of a picosecond pulse propagating along the stripline for millimeter-scale distances.

© 2000 Optical Society of America

Full Article  |  PDF Article
More Like This
Study of photoexcited-carrier dynamics in GaAs photoconductive switches using dynamic terahertz emission microscopy

Hironaru Murakami, Shogo Fujiwara, Iwao Kawayama, and Masayoshi Tonouchi
Photon. Res. 4(3) A9-A15 (2016)

Ultrafast carrier-relaxation dynamics in self-assembled InAs/GaAs quantum dots

Dzmitry A. Yarotski, Richard D. Averitt, Nicolas Negre, Scott A. Crooker, Antoinette J. Taylor, Giovanni P. Donati, Andreas Stintz, Luke F. Lester, and Kevin J. Malloy
J. Opt. Soc. Am. B 19(6) 1480-1484 (2002)

Carrier dynamics of terahertz emission from low-temperature-grown GaAs

Dongfeng Liu and Jiayin Qin
Appl. Opt. 42(18) 3678-3683 (2003)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (8)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved