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Waveform-sequencing for scanning tunneling microscopy based pump-probe spectroscopy and pulsed-ESR


Natterer, Fabian Donat (2019). Waveform-sequencing for scanning tunneling microscopy based pump-probe spectroscopy and pulsed-ESR. MethodsX, 6:1279-1285.

Abstract

We present here the straightforward implementation of pump-probe methods into existing scanning tunneling microscopy (STM) systems. Our method uses the waveform-sequencing abilities of a standard arbitrary waveform generator (AWG) and a simple mechanical relay switch that either connects the regular STM control electronics or the AWG to the STM system. Our upgrade further enables pulsed-ESR excitation for advanced STM based spin-resonance experiments. We demonstrate the technical implementation, signal detection using a lock-in amplifier, and cross-correlation measurements of DC/DC and DC/RF pulses highlighting our ˜5 ns time resolution, here limited by the speed of the available electronics. Our setup is highly versatile and can be extended to suit other needs of STM based investigations such as required in diverse mapping schemes or the coherent manipulation of qubits.

• Plug and Play Pump-Probe Capability
• One setup for Pump-Probe Spectroscopy and Pulsed-ESR
• Waveform Memory Saving and Versatile due to Waveform-Sequencing of Arbitrary Waveforms

Abstract

We present here the straightforward implementation of pump-probe methods into existing scanning tunneling microscopy (STM) systems. Our method uses the waveform-sequencing abilities of a standard arbitrary waveform generator (AWG) and a simple mechanical relay switch that either connects the regular STM control electronics or the AWG to the STM system. Our upgrade further enables pulsed-ESR excitation for advanced STM based spin-resonance experiments. We demonstrate the technical implementation, signal detection using a lock-in amplifier, and cross-correlation measurements of DC/DC and DC/RF pulses highlighting our ˜5 ns time resolution, here limited by the speed of the available electronics. Our setup is highly versatile and can be extended to suit other needs of STM based investigations such as required in diverse mapping schemes or the coherent manipulation of qubits.

• Plug and Play Pump-Probe Capability
• One setup for Pump-Probe Spectroscopy and Pulsed-ESR
• Waveform Memory Saving and Versatile due to Waveform-Sequencing of Arbitrary Waveforms

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Life Sciences > Clinical Biochemistry
Health Sciences > Medical Laboratory Technology
Language:English
Date:1 January 2019
Deposited On:09 Jan 2020 12:50
Last Modified:12 Sep 2020 11:46
Publisher:Elsevier
ISSN:2215-0161
OA Status:Gold
Publisher DOI:https://doi.org/10.1016/j.mex.2019.05.026

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