Shaping the infrared luminescence of colloidal nanocrystals using a dielectric microcavity

Erwan Bossavit (1) , Huichen Zhang (2) , Nicolas Ledos (2) , Mariarosa Cavallo (2) , Dario Mastrippolito (2) , Leonardo Curti (3) , Adrien Khalili (2) , Albin Colle (2) , Pierrick Lample (4) , Mateusz Weis (4) , Florent Margaillan (5) , Xavier Lafosse (6) , Yoann Prado (7) , Emmanuel Péronne (4) , Debora Pierucci (8) , Sandrine Ithurria (3) , Davide Boschetto (4) , Benjamin Diroll (9) , Aloyse Degiron (10) , Emmanuel Lhuillier (2, 11)

1 SSOLEIL - Synchrotron SOLEIL
2 INSP-E6 - Physico-chimie et dynamique des surfaces
3 LPEM - Laboratoire de Physique et d'Etude des Matériaux (UMR 8213)
4 LOA - Laboratoire d'optique appliquée
5 INSP-E12 - Photonique et cohérence de spin
6 C2N - Centre de Nanosciences et de Nanotechnologies
7 INSP-E15 - Nanophotonique et optique quantique
8 INSP - Institut des Nanosciences de Paris
9 ANL - Argonne National Laboratory [Lemont]
10 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
11 INSP - Institut des Nanosciences de Paris

As they have gained maturity, colloidal nanocrystals (NCs) have also expand the spectral range over of which they could be used for photonic and optoelectronic applications. In particular, the infrared use of NCs has become of utmost interest to develop cost‐effective alternatives to current technologies. It is then critical not to let the material dictate the light–matter interaction, which is why the coupling of NCs to photonic cavities has been proposed. For infrared NCs, this approach has first been devoted to the control of absorption with in mind the increase of the signal magnitude for detectors. A Lot of efforts have been focused on the use of metallic metasurfaces. However, these generate significant optical losses and yield low quality factor. Here, this study rather focus on the coupling of infrared NCs to a dielectric mirror cavity. HgTe/CdS core‐shell NCs are used and integrated into a cavity made of aperiodic dielectric mirrors. The effect of the substrate is systematically study on spectral linewidth, carrier dynamic, and emission directivity. The cavity is shown to narrow the PL by a factor 10, while focusing the emission over a 12° angle. Monitoring the power dependence of the emission, this study shows that the cavity leads to 250 K increase in the effective electronic temperature.

Mots clés: infrared HgTe nanocrystals photoluminescence photonic cavity; infrared; HgTe; nanocrystals; photoluminescence; photonic cavity

Domaines: Physique [physics]

Erwan Bossavit, Huichen Zhang, Nicolas Ledos, Mariarosa Cavallo, Dario Mastrippolito, et al.. Shaping the infrared luminescence of colloidal nanocrystals using a dielectric microcavity. Advanced Functional Materials, 2024, ⟨10.1002/adfm.202403532⟩. ⟨hal-04541939⟩