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Activity title

Nanotechnology for Optics & Infrared Photo Detection

Activity Reference

SET-289

Panel

Sensors & Electronics Technology

Security Classification

PUBLIC RELEASE

Status

Proposed

Activity type

RWS

Start date

2020

End date

2020

Keywords

hyperspectral detection, infrared, nanoantennas, photon sorting, plasmonic resonances

Background

Surface plasmon polaritons (SPPs) are electromagnetic modes propagating at a metal-dielectric interface. It is possible to induce SPP resonances in a metallic layer structured at the subwavelength scale. Such resonances allow for manipulation of light (e.g. total isotropic absorption, thermal emission) at a subwavelength scale, and are thus promising in various applications like new optical functionality, photodetection, stealth. As an illustrative example, SPP based photodetectors are able to sort photons by color, which is more energy effective than spectral filtering. Indeed it allows multi- & hyper-spectral imaging to be performed without any scanning operation (which results in a gain of integration time), and without waste of photons (leading to high resolution and sensitivity)… To achieve this breakthrough for photodetection the work must be done at the pixel level: by integrating several dimensions of nano-antennas, each detecting a different wavelength, the same sub-pixel surface to detect several wavelengths. Moreover the coupling of SPP resonances at the subwavelength scale can be used to tailor the optical properties of surface: spatially, spectrally, in reflection, transmission, absorption, polarization and phase. This is a key element for nanostructured thermal sources. The coupling of those mechanisms with nonlinear optical properties (e.g., in a quantum well) open a promising route for coherent, energy-effective, and timely-tunable thermal sources. For military applications a key technology will be the use of high temperature materials to address the mid-wave or short region of the infrared spectrum. A first workshop was held in 2012 and aroused interest of the plasmonic community, one of the conclusions was to re-iterate it every 3-4 years. Since this workshop some breakthrough technologies were demonstrated in the literature and further potentialities appeared. For instance plasmonics based quantum well photodetectors with enhanced operating temperature [1], or metalenses integrated on infrared photodetectors for enhanced performances [2] [1] Palaferri et al., Nature volume 556, pages 85–88 (05 April 2018) [2] Zhang et al. Applied Physics Letters 113, 111104 (2018)

Objectives

Plasmonics can address current and future challenges for infrared light application: both in detection (enhanced detectivity, high working temperature, multispectral detection, coherent thermal emission, THz sources), and for the control of optical surface properties with nanoantennas (metalenses, selective total absorption, stealth and thermal sources). The objective of this workshop, which will be held in second part of 2020, is first to update our knowledge on the plasmonic activities and their potential for military applications and then second to structure a working group for a technological demonstration in these one or two main themes. Deliverables: Meeting proceedings. Technical Evaluation report

Topics

This workshop will concentrate on the potential of plasmonic technologies for improving efficiencies and/or adding functionality to future optoelectronic systems both in detection and surface properties of objects. It will show trends for the use of plasmonics to engineer quantum performances and/or electromagnetic signatures. The Objectives will be addressed for each of the following subject areas: 1. Plasmonic photodetection (MW-, SW infrared detection) 2. Nanoantennas and metasurfaces 3. Meta-sources : thermal emission, non linear components

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