Passive dual-probe near-field microscopy

Accurate and simultaneous multiposition near-field measurements are essential to study the time-dependent local dynamics, including heat and carrier transfer. The existing passive long-wavelength infrared (LWIR) scattering-type scanning near-field optical microscopy (s-SNOM) systems with a single pr...

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Veröffentlicht in:Review of scientific instruments 2022-11, Vol.93 (11), p.113708-113708
Hauptverfasser: Sakuma, R., Nagai, Y., Nakajima, H., Lin, K.-T., Kajihara, Y.
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container_end_page 113708
container_issue 11
container_start_page 113708
container_title Review of scientific instruments
container_volume 93
creator Sakuma, R.
Nagai, Y.
Nakajima, H.
Lin, K.-T.
Kajihara, Y.
description Accurate and simultaneous multiposition near-field measurements are essential to study the time-dependent local dynamics, including heat and carrier transfer. The existing passive long-wavelength infrared (LWIR) scattering-type scanning near-field optical microscopy (s-SNOM) systems with a single probe cannot perform precise near-field measurements of the heat or carrier transporting process at the nanoscale level. Therefore, in this study, we developed a passive LWIR s-SNOM system with two probes. To test the effectiveness of the proposed passive LWIR dual-probe s-SNOM system, each probe was precisely controlled using a shear-force feedback system, and the mechanical interference between the probes was used to monitor the distance between the probes. We achieved simultaneous near-field measurements at two different positions 500 nm apart using the proposed passive LWIR dual-probe s-SNOM system. The simultaneously detected near-field signals from two different points were extracted individually, making this technique an effective nanoscale analysis tool for local carrier dynamics.
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subjects Near fields
Optical microscopy
Scientific apparatus & instruments
title Passive dual-probe near-field microscopy
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