Colloidal HgTe Material for Low-Cost Detection into the MWIR

Emmanuel Lhuillier (1) , Sean Keuleyan (2) , Heng Liu (1) , Philippe Guyot-Sionnest (1)

1 James Franck Institute
2 University of Oregon [Eugene]

We report on HgTe colloidal-based quantum-dot mid-infrared (IR) photode-tectors. We demonstrate tuning the cutoff wavelength of this detector from the near IR up to 7 lm. Responsivity values of films of HgTe nanoparticles a few hundred nanometers thick are in the 100 mA W À1 range even at room temperature. The detectivity of this film is limited by large 1/f noise. Time responses as short as 200 ns are achieved.

Mots clés: Colloidal quantum dot; HgTe; mid-infrared; photodetectors

Domaines: Matériaux; Matière Condensée [cond-mat]

Emmanuel Lhuillier, Sean Keuleyan, Heng Liu, Philippe Guyot-Sionnest. Colloidal HgTe Material for Low-Cost Detection into the MWIR. conference II-VI chicago 2011, 2011, chicago, United States. pp.2725 - 2729, ⟨10.1007/s11664-012-2006-9⟩. ⟨hal-01438631⟩