A sub-μs thermal time constant electrically driven Pt nanoheater: thermo-dynamic design and frequency characterization

Briano, Floria Ottonello; Sohlström, Hans; Forsberg, Fredrik; Renoux, Pauline; Ingvarsson, Snorri; Stemme, Göran; Gylfason, Kristinn B.

doi:10.1063/1.4948979

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…Table compares the performance of our graphene emitters with the current state of the art achieved with both conventional materials and other nanoemitters. We included representative publications of thick and thin metallic thermal emitters emitting into free space. − We also covered publications on thermal graphene emitters emitting into free space − ,− and representative publications for monolayer and multilayer graphene. We extended the list to incandescent emitting materials, − which includes electroluminescent and incandescent CNT emitters coupled with photonic waveguides.…”

Section: Discussionmentioning

confidence: 99%

Graphene Thermal Infrared Emitters Integrated into Silicon Photonic Waveguides

Negm,

Zayouna,

Parhizkar

et al. 2024

ACS Photonics

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Cost-efficient and easily integrable broadband mid-infrared (mid-IR) sources would significantly enhance the application space of photonic integrated circuits (PICs). Thermal incandescent sources are superior to other common mid-IR emitters based on semiconductor materials in terms of PIC compatibility, manufacturing costs, and bandwidth. Ideal thermal emitters would radiate directly into the desired modes of the PIC waveguides via near-field coupling and would be stable at very high temperatures. Graphene is a semimetallic two-dimensional material with comparable emissivity to thin metallic thermal emitters. It allows maximum coupling into waveguides by placing it directly into their evanescent fields. Here, we demonstrate graphene mid-IR emitters integrated with photonic waveguides that couple directly into the fundamental mode of silicon waveguides designed to work in the so-called “fingerprint region” relevant for gas sensing. High broadband emission intensity is observed at the waveguide-integrated graphene emitter. The emission at the output grating couplers confirms successful coupling into the waveguide mode. Thermal simulations predict emitter temperatures up to 1000 °C, where the blackbody radiation covers the mid-IR region. A coupling efficiency η, defined as the light emitted into the waveguide divided by the total emission, of up to 68% is estimated, superior to data published for other waveguide-integrated emitters.

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Section: Discussionmentioning

confidence: 99%

Graphene Thermal Infrared Emitters Integrated into Silicon Photonic Waveguides

Negm,

Zayouna,

Parhizkar

et al. 2024

ACS Photonics

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“…15,16) Furthermore, Pt thick film also has excellent stability and chemical inertness up to high temperature and is used as film heaters. [17][18][19] The preliminary work on the heating window application was published in the abstract of the 13 th International Conference on two-phase systems for space and ground applications (ITTW, Xi'an, China, October 15, 2018). In this paper, we demonstrated the latest performance of the improved translucent heating window for boiling observation.…”

Section: Introductionmentioning

confidence: 99%

Tube inside translucent platinum film with the function of temperature measurement for heating window applications

Shen

2019

Jpn. J. Appl. Phys.

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For experiments of flow boiling, a window with the functions of heating and temperature measurement of the heater is an ideal tool to observe flow patterns and measure the heat transfer coefficient at the same time. In the present work, we prepared a translucent tube typically 90 mm in length and 7.0 mm in i.d. with the functions of directly heating fluid flowing through and measuring the temperature of the heating surface for this purpose. Conductive platinum (Pt) film was prepared on the inner surface of a quartz tube by using the precursor solution having a resistance of 50–70 Ω and a good linear relationship between resistance and temperature. We demonstrated the processes of nucleation, evaporation and boiling of water at different temperatures with the heating window. This attempt may provide a tool for the accurate measurement of heat transfer coefficient during the boiling process.

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“…Nano-and micropatterned metal wire structures have attracted significant attention due to their possible applications, which, despite their simplicity might be as varied as serving as microscopic light sources [1][2][3], being used in near-field microscopy [4], as IR detectors or microbolometers [5] or as sources with tunable spectra [6]. Reliability and durability of such metallic wire structures are very important issues in device applications.…”

Section: Introductionmentioning

confidence: 99%

Grain growth in Pt microheaters subjected to high current density under constant power

Elíasson

Vasile

Ingvarsson

2018

J. Phys. D: Appl. Phys.

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When 50 nm thick Pt microheaters of lateral dimensions 1 × 10 µm 2 are subjected to high electric power their resistance R rises, as expected. Following an initial rise however there is a gradual decrement in R while constant electric power dissipation is maintained. We find that this lowering in R is accompanied by grain growth in the polycrystalline thin Pt film of our heaters. This is confirmed by XRD measurements and SEM imaging. Similar growth in grain size is observed in thin Pt films that are oven-annealed at high temperatures. Thus we argue that maintaining high power dissipation in a microheater has the same effect on its material structure as post-annealing. We observe the in-plane grain size of a 50 nm thick as-grown Pt film/heater to be D = 15 nm. When post-annealed at a temperature of T = 600 • C for 30 min, D = 30 nm, compared with when electric current is run through a heater we estimate the mean crystalline length to be D = 35 nm.

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A sub-μs thermal time constant electrically driven Pt nanoheater: thermo-dynamic design and frequency characterization

Cited by 6 publications

References 19 publications

Graphene Thermal Infrared Emitters Integrated into Silicon Photonic Waveguides

Graphene Thermal Infrared Emitters Integrated into Silicon Photonic Waveguides

Tube inside translucent platinum film with the function of temperature measurement for heating window applications

Grain growth in Pt microheaters subjected to high current density under constant power

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