Thermal Emission of Silicon at Near-Infrared Frequencies Mediated by Mie Resonances
| Autor: | M. Garín, Ramon Alcubilla, Fernando Ramiro-Manzano, Roberto Fenollosa |
|---|---|
| Přispěvatelé: | Ministerio de Economía y Competitividad (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Microsphere
Silicon Astrophysics::High Energy Astrophysical Phenomena media_common.quotation_subject European Regional Development Fund 02 engineering and technology 01 natural sciences 010309 optics Excellence Political science 0103 physical sciences Regional science Light source Electrical and Electronic Engineering media_common Thermal emission 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Nanocavity Work (electrical) Whispering gallery modes Super-Planckian Christian ministry 0210 nano-technology Biotechnology |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Popis: | [EN] Planck's law constitutes one of the cornerstones in physics. It explains the well-known spectrum of an ideal blackbody consisting of a smooth curve, whose peak wavelength and intensity depend on the temperature of the body. This scenario changes drastically, however, when the size of the emitting object is comparable to the wavelength of the emitted radiation. Here we show that a silicon microsphere (2-3 mu m in diameter) heated to around 800 degrees C yields a thermal emission spectrum consisting of pronounced peaks that are associated with Mie resonances. We experimentally demonstrate in the near-infrared the existence of modes with an ultrahigh quality factor, Q, of 400, which is substantially higher than values reported so far, and set a new benchmark in the field of thermal emission. Simulations predict that the thermal response of the microspheres is very fast, about 15 mu s. Additionally, the possibility of achieving light emission above the Planck limit at some frequency ranges is envisaged. This work was supported by several projects of the Spanish Ministry of Economy and Competitiveness (MINECO), Severo Ochoa program for Centers of Excellence (SEV-2016-0683), MAT2015-69669-PM, ENE2013-49984-EXP, ENE2015-74009-JIN (cofunded by the European Regional Development Fund), and of the Spanish Science, Innovation and Universities, PGC2018-099744-B-100. F.R.-M. thanks the financial contribution of MINECO through the program for young researchers support, TEC 2015 2015-74405-JIN. The authors greatly acknowledge the contribution of Prof. Francisco Meseguer for both the fruitful discussions and the revision of the manuscript, and Prof. Marie Louise McCarrey for careful proofreading of the manuscript. |
| Databáze: | OpenAIRE |
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