Ultrasharp, Cavity Enhanced, Broadly Tunable Infrared Detection Using Colloidal Quantum Dots
After the success of semiconductor nanocrystals as light sources for displays in the visible range, the infrared range now offers a complementary playground. Applications requiring chemical contrast in images and applications to LIDAR technology incentivize the development of devices with narrow spectral responses. However, the solutions that rely on introducing notch filters still suffer from imperfect transmission at the wavelength of interest in a spectral range where their detection is already difficult. Here, we explore the integration of a short-wave infrared detector directly into a dielectric microcavity. Our approach simultaneously achieves ultranarrow absorption lines below 30 cm<sup>-1</sup> at a telecom wavelength, together with a broadband, continuous, postfabrication spectral tunability over 1200 cm<sup>-1</sup>. By taking advantage of the field magnification inside the cavity, we demonstrate that the spectral shaping properties can be obtained while maintaining performances on par with an uncoupled device, stressing the benefit of this method compared to filter-only approaches.
Authors
- Mariarosa Cavallo (ORCID: https://orcid.org/0000-0002-8768-5545)
- Kseniia A. Sergeeva (ORCID: https://orcid.org/0000-0001-9622-7872)
- Marc Paye
- Emmanuel Lhuillier (ORCID: https://orcid.org/0000-0003-2582-1422)
- Xavier Lafosse (ORCID: https://orcid.org/0000-0002-7807-7564)
- Mathieu G. Silly (ORCID: https://orcid.org/0000-0002-0302-8442)
- Debora Pierucci (ORCID: https://orcid.org/0000-0001-8751-1994)
- Adrien Khalili (ORCID: https://orcid.org/0000-0001-5685-9963)
- Erwan Bossavit (ORCID: https://orcid.org/0000-0001-6088-3309)
- Dario Mastrippolito (ORCID: https://orcid.org/0000-0001-6360-7254)
- Erwan Dandeu
- Yoann Prado (ORCID: https://orcid.org/0000-0001-6228-2486)
- Sandrine Ithurria (ORCID: https://orcid.org/0000-0002-4733-9883)
- Clément Gureghian
- Albin Colle (ORCID: https://orcid.org/0009-0004-6683-8815)
- Yanjun Ma (ORCID: https://orcid.org/0009-0001-9091-0555)
- Tommaso Gemo (ORCID: https://orcid.org/0009-0005-8399-9706)
- Mohamad Hamieh
- Dries De Pesseroey
Institutions
- Centre National de la Recherche Scientifique (FR)
- Université Paris Sciences et Lettres (FR)
- Université Paris-Saclay (FR)
- Synchrotron soleil (FR)
- Sorbonne Université (FR)
- Laboratoire de Physique et d’Étude des Matériaux (FR)
- Centre de Nanosciences et de Nanotechnologies (FR)
- Institut des NanoSciences de Paris (FR)
Publication Details
- Journal
- Nano Letters
- Published
- 2025-06-02
- DOI
- https://doi.org/10.1021/acs.nanolett.5c02212
- Citations
- 1
- Primary Topic
- Quantum Dots Synthesis And Properties
- Type
- article
- Field-Weighted Citation Impact
- 0.52
Funders
- Agence Nationale de la Recherche
- Conseil Régional, Île-de-France
- Institut de physique
- HORIZON EUROPE European Research Council