Nanothermometer Based on Resonant Tunneling Diodes: From Cryogenic to Room Temperatures

TitleNanothermometer Based on Resonant Tunneling Diodes: From Cryogenic to Room Temperatures
Publication TypeJournal Article
Year of Publication2015
AuthorsPfenning A, Hartmann F, Dias MRebello So, Castelano LKleber, Süßmeier C, Langer F, Höfling S., Kamp M, Marques GEugenio, Worschech L, Lopez-Richard V
JournalACS Nano
Paginationnull
Abstract

Sensor miniaturization together with broadening temperature sensing range are fundamental challenges in nanothermometry. By exploiting a large temperature-dependent screening effect observed in a resonant tunneling diode in sequence with a GaInNAs/GaAs quantum well, we present a low dimensional, wide range, and high sensitive nanothermometer. This sensor shows a large threshold voltage shift of the bistable switching of more than 4.5 V for a temperature raise from 4.5 to 295 K, with a linear voltage–temperature response of 19.2 mV K–1, and a temperature uncertainty in the millikelvin (mK) range. Also, when we monitor the electroluminescence emission spectrum, an optical read-out control of the thermometer is provided. The combination of electrical and optical read-outs together with the sensor architecture excel the device as a thermometer with the capability of noninvasive temperature sensing, high local resolution, and sensitivity.

URLhttp://dx.doi.org/10.1021/acsnano.5b01831
DOI10.1021/acsnano.5b01831
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