Nanothermometer based on resonant tunneling diodes : from cryogenic to room temperatures
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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.
Pfenning , A , Hartmann , F , Rebello Sousa Dias , M , Castelano , L K , Süßmeier , C , Langer , F , Höfling , S , Kamp , M , Marques , G E , Worschech , L & Lopez-Richard , V 2015 , ' Nanothermometer based on resonant tunneling diodes : from cryogenic to room temperatures ' , ACS Nano , vol. 9 , no. 6 , pp. 6271-6277 . https://doi.org/10.1021/acsnano.5b01831
© 2015, Publisher / the Author(s). This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at pubs.acs.org / https://dx.doi.org/10.1021/acsnano.5b01831