Guided mode resonator coupled with nanocrystal intraband absorption - Archive ouverte HAL Access content directly
Journal Articles ACS photonics Year : 2022

Guided mode resonator coupled with nanocrystal intraband absorption

Mateusz Weis
Audrey Chu
Tung Huu Dang
Claire Abadie
Charlie Gréboval
Yoann Prado
Julien Ramade
  • Function : Author
  • PersonId : 780221
  • IdRef : 197844219
Davide Boschetto


Intraband absorption in doped nanocrystals offers an interesting alternative to narrow band gap materials to explore mid infrared optoelectronic device designs. However, the performance of such device clearly lags behind the ones relying on intrinsic materials. Livache et al. have proposed a dye sensitized approach to overcome the limitations observed from intraband materials (high dark current, slow response, low activation energy), where the intraband absorber is coupled to an undoped material which takes care of the charge conduction. Here, we unveil the coupling between both materials using mid-infrared transient reflectivity (TR) measurement. We show that hybrid material displays a unique feature in the TR signal that we attribute to a charge transfer and for which the dynamic matches the hopping time. We then developed a strategy to enhance the photodetection performances of the hybrid material by coupling for the first time intraband absorption to a light resonator. The latter is used to enhance the absorption by a factor 4 and enables an increase of the operating temperature by 80 K compared to the reference device. The obtained device matches the performance of best devices relying on intraband absorption.
Fichier principal
Vignette du fichier
intra_v26.pdf (1.08 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03564753 , version 1 (10-02-2022)



Adrien Khalili, Mateusz Weis, Simon Gwénaël Mizrahi, Audrey Chu, Tung Huu Dang, et al.. Guided mode resonator coupled with nanocrystal intraband absorption. ACS photonics, 2022, ⟨10.1021/acsphotonics.1c01847⟩. ⟨hal-03564753⟩
152 View
22 Download



Gmail Facebook Twitter LinkedIn More