TY - JOUR
T1 - Fiber Coupled Near-Field Thermoplasmonic Emission from Gold Nanorods at 1100 K
AU - Li, Jiayu
AU - Wuenschell, Jeffrey
AU - Li, Zhuo
AU - Bera, Subhabrata
AU - Liu, Kai
AU - Tang, Renhong
AU - Du, Henry
AU - Ohodnicki, Paul R.
AU - Shen, Sheng
N1 - Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021/4/28
Y1 - 2021/4/28
N2 - Nanostructured gold has attracted significant interest from materials science, chemistry, optics and photonics, and biology due to their extraordinary potential for manipulating visible and near-infrared light through the excitation of plasmon resonances. However, gold nanostructures are rarely measured experimentally in their plasmonic properties and hardly used for high-temperature applications because of the inherent instability in mass and shape due to the high surface energy at elevated temperatures. In this work, the first direct observation of thermally excited surface plasmons in gold nanorods at 1100 K is demonstrated. By coupling with an optical fiber in the near-field, the thermally excited surface plasmons from gold nanorods can be converted into the propagating modes in the optical fiber and experimentally characterized in a remote manner. This fiber-coupled technique can effectively characterize the near-field thermoplasmonic emission from gold nanorods. A direct simulation scheme is also developed to quantitively understand the thermal emission from the array of gold nanorods. The experimental work in conjunction with the direct simulation results paves the way of using gold nanostructures as high-temperature plasmonic nanomaterials, which has important implications in thermal energy conversion, thermal emission control, and chemical sensing.
AB - Nanostructured gold has attracted significant interest from materials science, chemistry, optics and photonics, and biology due to their extraordinary potential for manipulating visible and near-infrared light through the excitation of plasmon resonances. However, gold nanostructures are rarely measured experimentally in their plasmonic properties and hardly used for high-temperature applications because of the inherent instability in mass and shape due to the high surface energy at elevated temperatures. In this work, the first direct observation of thermally excited surface plasmons in gold nanorods at 1100 K is demonstrated. By coupling with an optical fiber in the near-field, the thermally excited surface plasmons from gold nanorods can be converted into the propagating modes in the optical fiber and experimentally characterized in a remote manner. This fiber-coupled technique can effectively characterize the near-field thermoplasmonic emission from gold nanorods. A direct simulation scheme is also developed to quantitively understand the thermal emission from the array of gold nanorods. The experimental work in conjunction with the direct simulation results paves the way of using gold nanostructures as high-temperature plasmonic nanomaterials, which has important implications in thermal energy conversion, thermal emission control, and chemical sensing.
KW - gold nanorods
KW - nanostructured sapphire fiber
KW - plasmonics
KW - thermal radiation
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U2 - 10.1002/smll.202007274
DO - 10.1002/smll.202007274
M3 - Article
C2 - 33719149
AN - SCOPUS:85102464281
SN - 1613-6810
VL - 17
JO - Small
JF - Small
IS - 17
M1 - 2007274
ER -