Measuring Nanowire-Substrates Thermal Boundary Conductance with Ease NatureComms nanowires nanoanalysis
By Bhavna KavetiSep 20 2022Reviewed by Susha Cheriyedath, M.Sc. Any changes in the surface or dimension in nanoscale devices alter their thermal transport. Hence, controlling thermal transport is critical in these devices.
These measurements agree with acoustic mismatch theory for a broad range of substrates. Despite performing numerical simulations, the open question on the mechanism underlying thermal boundary conductance remained unanswered. The present work could serve as guidance for the thermal engineering of next-generation superconducting nanowire single-photon detectors.
Related StoriesPhase slip in a thin superconducting wire occurs on the scale of the superconducting coherence length, and phase-slip coherent tunneling is affected by heating in phase-slip junctions. Superconducting nanowire single-photon detectors rely on localized hotspots to detect infrared photons. Here, the energy deposited into the superconducting nanowire single-photon detectors is gradually released into the substrate as phonons.
Although this type of quantification was previously reported, it was restricted to the micrometer scale, one substrate type, and did not match the theoretical expectations. Furthermore, some values for the thermal boundary conductance reported in the literature were larger than the theoretical values. In contrast, the reinterpretation of others through the present scheme agreed with the theoretical values.
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