Long-lived modulation of plasmonic absorption by ballistic thermal injection

Tomko, John A.; Runnerstrom, Evan L.; Wang, Yi Siang; Chu, Weibin; Nolen, J. Ryan; Olson, David H.; Kelley, Kyle P.; Cleri, Angela; Nordlander, Josh; Caldwell, Joshua D.; Prezhdo, Oleg V.; Maria, Jon Paul; Hopkins, Patrick E.

doi:10.1038/s41565-020-00794-z

Cited by 45 publications

(45 citation statements)

References 26 publications

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“…Zheng et al observed a responsivity of about 60 nA/mW. A ballistic thermal injection mechanism in Au/CdO junctions was reported by Tomko et al 58 . Their experiments were conducted to demonstrate that in Au/CdO junctions the excited electron of Au stay at highly elevated temperatures for prolonged time due to the weak electro-phonon coupling factor of Au, and that the energy of excited electrons can ballistically traverse the Au lm reaching the Au/CdO interface and directly couple the excess of energy into CdO electrons, without charge transfer.…”

Section: Photothermoelectric (Pte) Devicementioning

confidence: 79%

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Near Infrared Photothermoelectric Effect in Transparent AZO/ITO/Ag/ITO Thin Films

Bianchi¹,

Marques²,

Silva³

et al. 2021

Preprint

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A new concept of oxide-metal-oxide structures that combine photothermoelectric effect with high reflectance (~80%) at wavelengths in the infrared (> 1100 nm) and high transmittance in the visible range is reported here. This was observed in optimized ITO/Ag/ITO structure, 20 nm of Siver (Ag) and 40 nm of Indium Tin Oxide (ITO), deposited on Aluminum doped Zinc Oxide (AZO) thin film. These layers show high energy saving efficiency by keeping the temperature constant inside a glazed compartment under solar radiation, but additionally they also show a photothermoelectric effect. Under uniform heating of the sample a thermoelectric effect is observed (S = 40 μV/K), but when irradiated, a potential proportional to the intensity of the radiation is also observed. Therefore, in addition to thermal control in windows, these low emission coatings can be applied as transparent photothermoelectric devices.

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Section: Photothermoelectric (Pte) Devicementioning

confidence: 79%

“…Although, PTE effect has been correlated with the generation of thermal gradient caused by punctual heating, plasmonic effects were recently demonstrated using nanostructures to enhance light absorption in metallic layers 62 or a ballistic thermal injection in Au/CdO structures 58 .…”

Section: Photothermoelectric (Pte) Devicementioning

confidence: 99%

Near Infrared Photothermoelectric Effect in Transparent AZO/ITO/Ag/ITO Thin Films

Bianchi¹,

Marques²,

Silva³

et al. 2021

Preprint

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show abstract

“…As a result, we turn to additional experimental measurements to verify this. First, we provide a direct measurement of both the electron and phonon lifetimes in the crystalline phases of GSST and GST through ultrafast mid-infrared spectroscopy 55 , 56 .…”

Section: Resultsmentioning

confidence: 99%

“…To further investigate the varying scattering mechanisms that give rise to changes in the thermal conductivity of these chalcogenide-based PCMs, we turn to mid-infrared (MIR) pump-probe spectroscopy to directly monitor the lifetime of electronic and vibrational energy carriers in these materials. Described in more detail elsewhere 55 , 56 , we excite the GSST and GST films with a sub-picosecond 520 nm pump pulse, thus inducing a non-equilibrium state in the film of interest. At varying time delays, a tunable-wavelength MIR probe pulse interrogates the change in reflectivity of the film due to the change in either carrier concentration or temperature 57 .…”

Section: Resultsmentioning

confidence: 99%

Suppressed electronic contribution in thermal conductivity of Ge2Sb2Se4Te

et al. 2021

Self Cite

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Integrated nanophotonics is an emerging research direction that has attracted great interests for technologies ranging from classical to quantum computing. One of the key-components in the development of nanophotonic circuits is the phase-change unit that undergoes a solid-state phase transformation upon thermal excitation. The quaternary alloy, Ge2Sb2Se4Te, is one of the most promising material candidates for application in photonic circuits due to its broadband transparency and large optical contrast in the infrared spectrum. Here, we investigate the thermal properties of Ge2Sb2Se4Te and show that upon substituting tellurium with selenium, the thermal transport transitions from an electron dominated to a phonon dominated regime. By implementing an ultrafast mid-infrared pump-probe spectroscopy technique that allows for direct monitoring of electronic and vibrational energy carrier lifetimes in these materials, we find that this reduction in thermal conductivity is a result of a drastic change in electronic lifetimes of Ge2Sb2Se4Te, leading to a transition from an electron-dominated to a phonon-dominated thermal transport mechanism upon selenium substitution. In addition to thermal conductivity measurements, we provide an extensive study on the thermophysical properties of Ge2Sb2Se4Te thin films such as thermal boundary conductance, specific heat, and sound speed from room temperature to 400 °C across varying thicknesses.

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“…Further, the role of nonlinearities in high-field plasmonic systems and modulation of plasmonic absorption by ballistic thermal injection remain open questions. 117,118 Overall, resolving these apparent contradictions and advancing the understanding of hot carrier collection processes is of the greatest importance for the future of plasmonic hot carrier catalysis. Copyright 2020 American Association for the Advancement of Science.…”

Section: Interfacial Problems and Current Solutions For Extracting The Carriersmentioning

confidence: 99%

Challenges in Plasmonic Catalysis

et al. 2020

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The use of nanoplasmonics to control light and heat close to the thermodynamic limit enables exciting opportunities in the field of plasmonic catalysis. The decay of plasmonic excitations creates highly nonequilibrium distributions of hot carriers that can initiate or catalyze reactions through both thermal and nonthermal pathways. In this Perspective, we present the current understanding in the field of plasmonic catalysis, capturing vibrant debates in the literature, and discuss future avenues of exploration to overcome critical bottlenecks. Our Perspective spans first-principles theory and computation of correlated and far-from-equilibrium light-matter interactions, synthesis of new nanoplasmonic hybrids, and new steady-state and ultrafast spectroscopic probes of interactions in plasmonic catalysis, recognizing the key contributions of each discipline in realizing the promise of plasmonic catalysis. We conclude with our vision for fundamental and technological advances in the field of plasmon-driven chemical reactions in the coming years.

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Long-lived modulation of plasmonic absorption by ballistic thermal injection

Cited by 45 publications

References 26 publications

Near Infrared Photothermoelectric Effect in Transparent AZO/ITO/Ag/ITO Thin Films

Near Infrared Photothermoelectric Effect in Transparent AZO/ITO/Ag/ITO Thin Films

Suppressed electronic contribution in thermal conductivity of Ge2Sb2Se4Te

Challenges in Plasmonic Catalysis

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