Article
Chemistry, Analytical
Yaser Ghafoori, Andrej Vidmar, Andrej Kryzanowski
Summary: Temperature measurements are important in structural health monitoring. This article introduces the use of optical fiber distributed temperature sensors (DTS) based on Raman spectroscopy for accurate and precise temperature measurements. The manual calibration technique, combined with external temperature sensors, is proposed to improve the calibration of DTS systems, addressing the limitations of existing methods.
Article
Engineering, Electrical & Electronic
R. Strenaer, Y. Guhel, C. Gaquiere, B. Boudart
Summary: In this study, a time-resolved thermometry technique combining conventional Raman spectroscopy and CeO2 Raman micro-thermometers is proposed to measure the self-heating temperature of semiconductor components. The experimental results demonstrate that this technique has high spatial and temperature resolution in measuring the self-heating temperature of GaN-based transistors under real operating conditions.
MICROELECTRONICS RELIABILITY
(2023)
Article
Chemistry, Analytical
Sara Pettinato, Marco Girolami, Maria Cristina Rossi, Stefano Salvatori
Summary: This paper describes a compact electronic system that uses a synchronous demodulation measurement method to acquire pulsed-current signals. The system demonstrates superior performance in terms of signal-to-noise ratio compared to conventional instruments, and has a reading error of about 0.1% regardless of the signal duty cycle.
Article
Materials Science, Ceramics
Qianchao Ma, Qiyun Liu, Meihua Wu, Yifei Liu, Rui Wang, Ruxian Zhou, Yanheng Xu, Haichao Wei, Ruiyu Mi, Xin Min, Lefu Mei, Zhaohui Huang, Bin Ma
Summary: In this study, Eu3+ doped La2(MoO4)3 material was synthesized via the high-temperature solid-state method. The phase composition was confirmed by XRD analysis and the microstructure was observed through SEM. The fluorescence properties of Eu3+ in the doped samples were investigated and the prepared phosphors were found to be color tunable. The results imply that Eu3+-doped La2(MoO4)3 is a promising material for high performance non-contact optical thermometers.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
R. Strenaer, Y. Guhel, G. Brocero, C. Gaquiere, B. Boudart
Summary: This paper investigates the thermal characterization of GaN-based components and proposes a method to measure the thermal parameters using confocal Raman spectroscopy and micro-Raman thermometers. The accuracy of the method is experimentally demonstrated by estimating thermal resistance and Thermal Boundary Resistance (TBR). Additionally, temperature measurements using TiO2 and CeO2 micro-Raman thermometers are compared to determine their accuracy and reliability in measuring surface self-heating temperature of these components.
MICROELECTRONICS RELIABILITY
(2022)
Article
Nanoscience & Nanotechnology
Fabio Isa, James P. Best, Anna Marzegalli, Marco Albani, Christophe Comte, Jamie J. Kruzic, Avi Bendavid
Summary: A novel approach is presented in this paper to tailor the stress properties of diamond thin films through boron doping and micro-fabrication of bridges using focused ion beam milling. Experimental data, supported by detailed confocal micro-Raman investigations and finite element method calculations, suggest that appropriate design of microbridge geometries, together with boron doping, can significantly enhance or diminish material stress compared to non-patterned thin films. This approach, combined with deterministic incorporation and positioning of diamond color centers, may offer new opportunities to tailor the optical and spin properties of diamond-based quantum devices through stress engineering.
Article
Engineering, Electrical & Electronic
Thomaskutty Mathew, K. Elangovan, Anoop Chandrika Sreekantan
Summary: This article proposes simple and low-cost interfacing circuits for resistance thermometers. The proposed circuits have many advantages, including simplicity of architecture, lead-wire compensation, constant-current excitation, and minimal requirement of analog-to-digital converters (ADCs) for digitization. The circuits are extensively verified through experimental studies, and the results demonstrate that the nonlinearity and relative error of the developed circuits are both less than 0.05% and 0.32%, respectively, when tested with Pt1000 sensor. Finally, a comparison study is conducted to show the superiority of the proposed techniques.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Materials Science, Multidisciplinary
Jun Kikkawa, Koji Kimoto
Summary: In this study, a method for temperature measurement using monochromated electron probes is reported. Based on the principle of balancing between the annihilation and creation of phonons, this method enables the investigation of local static and dynamic thermal properties in various materials and devices. The use of acoustic phonons improves the accuracy of low-temperature measurements.
Article
Chemistry, Physical
Benjian Liu, Sen Zhang, Viktor Ralchenko, Dongyue Wen, Xiaohui Zhang, Jingjing Xue, Pengfei Qiao, Weihua Wang, Jiwen Zhao, Wenxin Cao, Bing Dai, Kang Liu, Jiecai Han, Jiaqi Zhu
Summary: The drastic miniaturization of high-frequency electronic devices has led to the importance of diamond microprocessors and logic chips operating under high-temperature conditions. This study successfully fabricated diamond Schottky diodes with good high-temperature performance using a selective growth method with a noble metal mask. Through comparing various parameter extraction methods, a stable logic AND gate circuit operating at high temperatures was achieved.
Article
Thermodynamics
Chaobo Yang, Hao Tang, Gaetano Magnotti
Summary: The paper demonstrates the application of Kerr-gated Raman spectroscopy in combustion environments, allowing for extraction of Raman spectra under different interference levels. The fast gating provided by the Kerr gate effectively suppresses laser induced interference in flames, extending the capability of Raman spectroscopy measurements.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Physics, Applied
Serhii Volosheniuk, Damian Bouwmeester, Chunwei Hsu, H. S. J. van der Zant, Pascal Gehring
Summary: Thermocurrent flowing through a single-molecule device provides valuable information about its quantum properties, electronic and phononic excitation spectra, and entropy. Experimentally measuring the thermoelectric heat-to-charge conversion efficiency can help select suitable molecules for highly efficient energy conversion devices predicted by theoretical studies. A superconductor-normal metal-superconductor Josephson junction thermometer is incorporated into the single-molecule device to accurately determine the temperature bias. This device architecture enables precise thermoelectric experiments on individual molecules at millikelvin temperatures.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Jie Ding, Yulan Li, Hui Chen, Yunpeng Cai, Zhenxu Bai, Yaoyao Qi, Bingzheng Yan, Yulei Wang, Zhiwei Lu
Summary: In this work, we investigate the impact of thermal loading on the performance of an external cavity diamond Raman laser. A model is formulated to study the temperature, thermal stress, and thermal deformation in the diamond Raman medium. Experimental results show a DRL generating Stokes emission at 1240 nm with high output power and beam quality.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Kunal Kumar, Olaf Stefanczyk, Szymon Chorazy, Koji Nakabayashi, Shin-ichi Ohkoshi
Summary: The study reports a class of molecular crystals containing weakly bonded lanthanide and metal complexes, exhibiting Raman scattering and luminescence characteristics, which can be used as temperature sensors. These molecular crystals show magnetism and temperature sensing capabilities, with potential applications as self-calibrating thermometers.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Biomedical
Xiao Liu, Takeru Yamazaki, Haw-Young Kwon, Satoshi Arai, Young-Tae Chang
Summary: Researchers have developed a new fluorescent thermometer, Thermo Greens (TGs), which can visualize temperature changes in almost all typical organelles, making it crucial for understanding intracellular temperature fluctuations.
MATERIALS TODAY BIO
(2022)
Article
Multidisciplinary Sciences
Naoki Takegawa, Masahiro Ishibashi, Aya Iwai, Noriyuki Furuichi, Toshihiro Morioka
Summary: This study investigated the effectiveness of recovery temperature anemometry (RTA) in different velocity ranges, showing that RTA is highly accurate for micrometer-level point velocity measurements, regardless of the type of thermometer used.
SCIENTIFIC REPORTS
(2021)
