Presentation + Paper
20 August 2020 Upper bound for the thermal emission of a hot nanoemitter assisted by a cold nanoantenna
Author Affiliations +
Abstract
In the last decades, designs of most incandescent sources have been realized by heating the whole device. Here we propose a novel approach consisting in taking advantage of hot nanoemitters that can be cooled in a few tens of nanoseconds. It offers a new opportunity for high speed modulation and for enhanced agility in the active control of polarization, direction and wavelength of emission. To compensate the weak thermal emission of isolated nanoemitters, we propose to insert them in some complex environments, such as e.g. the gap of cold nanoantenna, which allow a significant thermal emission enhancement of the hot nanovolume. In order to optimize this kind of device, a fully vectorial upper bound for the thermal emission of a hot nanoparticle in a cold environment is derived. This criterion is very general since it is equivalent to an absorption cross-section upper bound for the nanoparticle. Moreover, it is an intrinsic characteristic of the environment regardless of the nanoparticle, so it allows to decouple the design of the environment from the one of the hot nanovolume. It thus provides a good figure of merit to compare the ability of different systems to enhance thermal emission of hot nanoemitters.
Conference Presentation
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
E. Sakat, L. Wojszvzyk, J.-J. Greffet, J.-P. Hugonin, and C. Sauvan "Upper bound for the thermal emission of a hot nanoemitter assisted by a cold nanoantenna", Proc. SPIE 11461, Active Photonic Platforms XII, 114610H (20 August 2020); https://doi.org/10.1117/12.2567262
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Absorption

Antennas

Nanoantennas

Polarizability

Modulation

Electromagnetism

Back to Top