Plasmonic nanochannel structure for narrow-band selective thermal emitter

Plasmonic nanochannel structure for narrow-band selective thermal emitter

Zhiyu Wang, J. Kenji Clark, Li-Chung Huang, Ya-Lun Ho, Jean-Jacques Delaunaya

2017

Applied Physics Letters

A plasmonic structure consisting of a periodic arrangement of vertical silicon nanochannels connected by U-shaped gold layers is demonstrated as a spectrally selective thermal emitter. The plasmonic nanochannel structure sustains a coupled mode between a surface plasmon polariton and a stationary surface plasmon resonance, which induces a strong and sharp resonance observed in the form of a reflectance dip in the far field. Upon heating the structure, a strong and narrow-bandwidth thermal emittance peak is observed with a maximum emittance value of 0.72 and a full-width-at-half-maximum of 248 nm at a wavelength of 5.66 μm, which corresponds to the reflectance dip wavelength. Moreover, we demonstrate the control of the emission peak wavelength by varying the period of the structure. The plasmonic nanochannel structure realizes a small-size and selective infrared thermal emitter, which is expected to be applicable as an infrared light source.
This work was supported through Japan Society for the Promotion of Science (JSPS) KAKENHI Grant (Nos. 17H03229 and 15F15359) and JSPS Core-to-Core Program (Advanced Research Networks type A). A part of this work was conducted at the Center for Nano Lithography & Analysis, The University of Tokyo, supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. We would like to extend our grateful appreciation to Dr. Eric Lebrasseur, from VLSI Design and Education Center (VDEC), The University of Tokyo, for important technical support.A plasmonic structure consisting of a periodic arrangement of vertical silicon nanochannels connected by U-shaped gold layers is demonstrated as a spectrally selective thermal emitter. The plasmonic nanochannel structure sustains a coupled mode between a surface plasmon polariton and a stationary surface plasmon resonance, which induces a strong and sharp resonance observed in the form of a reflectance dip in the far field. Upon heating the structure, a strong and narrow-bandwidth thermal emittance peak is observed with a maximum emittance value of 0.72 and a full-width-at-half-maximum of 248 nm at a wavelength of 5.66 μm, which corresponds to the reflectance dip wavelength. Moreover, we demonstrate the control of the emission peak wavelength by varying the period of the structure. The plasmonic nanochannel structure realizes a small-size and selective infrared thermal emitter, which is expected to be applicable as an infrared light source.
This work was supported through Japan Society for the Promotion of Science (JSPS) KAKENHI Grant (Nos. 17H03229 and 15F15359) and JSPS Core-to-Core Program (Advanced Research Networks type A). A part of this work was conducted at the Center for Nano Lithography & Analysis, The University of Tokyo, supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. We would like to extend our grateful appreciation to Dr. Eric Lebrasseur, from VLSI Design and Education Center (VDEC), The University of Tokyo, for important technical support.

https://aip.scitation.org/doi/abs/10.1063/1.4989692

VIR-300

FTIR - Portable, Thermal emitter, narrow - band