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

• Published in: MethodsX Vol. 6; pp. 1279 - 1285
• Main Author: Natterer, Fabian Donat
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.01.2019; Elsevier
• Subjects: Physics and Astronomy; Pulsed-ESR; Pump-probe spectroscopy; Scanning tunneling microscopy; Time resolved measurements; Waveform-sequencing for scanning tunneling microscope based pump-probe spectroscopy and pulsed-ESR; Waveform-sequencing for scanning tunneling microscope based pump-probe spectroscopy and pulsed-ESR; Scanning tunneling microscopy; Pump-probe spectroscopy; Time resolved measurements; Pulsed-ESR
• ISSN: 2215-0161; 2215-0161
• DOI: 10.1016/j.mex.2019.05.026

[Display omitted] 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