Coherent Förster resonance energy transfer: A new paradigm for electrically driven quantum dot random lasers

Abstract

The many distinct advantages of random lasers focused efforts on developing a breakthrough from optical pumping to electrical pumping. However, progress in these is limited due to high optical loss and low gain. In this work, we demonstrate an electrically pumped quantum dot (QD) random laser with visible emission based on a previously unexplored paradigm named coherent Förster resonance energy transfer (CFRET). In the CFRET process, when a coherent photonic mode is formed because of multiple scattering of the emitted light traveling in mixed donor and acceptor QDs, the donor QDs not only serve as scattering centers but are also enable coherent energy transfer to acceptor QDs. Therefore, the laser action can be easily achieved, and the lasing threshold is greatly reduced. Our approach of electrically pumped QD-based random lasers represents a substantial step toward a full-spectrum random laser for practical applications.

Aging of Self-Assembled Lead Halide Perovskite Nanocrystal Superlattices: Effects on Photoluminescence and Energy Transfer

“…This prediction of ultrafast FRET explains the observation of sharp peaks from bulk-like CsPbBr 3 particles (acceptors) located on top of the superlattices (donor) aged in air by means of, e.g., FRET-assisted lasing. 97,98 Despite the good agreement, large variations in the calculated τ ET necessitate careful examination when using the FRET model. In addition to the uncertainty induced by estimating d, errors could propagate from experimentally determined values when recovering the prefactors in eq 2.…”

Study of laser actions by bird’s feathers with photonic crystals

“…The property of bright illuminations with low spatial coherence leads RLs to reach a significant achievement in imaging and display applications 1 – 6 . Except for lightning and imaging, RLs can also be used in optical sensors and optoelectronic devices 6 – 10 . 0D,2D, 3D heterostructures or polymers have been successfully developed for several optoelectronic applications 11 – 16 .…”

“…0D,2D, 3D heterostructures or polymers have been successfully developed for several optoelectronic applications 11 – 16 . Among them, 0D quantum dots (QDs), 2D graphdiyne, perovskite, metal–organic framework (MOF), and wrinkled polymers 10 , 17 – 20 , have been investigated as the light scattering materials of RLs. To facilitate the practical applications of RLs, the strategy to reduce their threshold becomes a critical issue.…”

“…Several methods were developed to reduce the threshold of RLs in combination with plasmonic nanoparticles, reflective mirrors, or fluorescence resonant energy transfer (FRET) 18 – 22 . For instance, Shen et al demonstrated coherent Förster resonance energy transfer by mixed donor QDs and acceptor QDs to achieve the lasing threshold reduction 10 . Weng et al studied that adding a patterned sapphire substrate efficiently reduced the lasing threshold from 2.55 to 0.15 μJ in CH 3 NH 3 PbBr 3 perovskite thin films 18 .…”

Study of Laser Actions by Bird’s Feathers With Photonic Crystals

“…To facilitate the practical applications of RLs, the strategy to reduce their threshold becomes a critical issue. Several methods were developed to reduce the threshold of RLs in combination with plasmonic nanoparticles, re ective mirrors, or uorescence resonant energy transfer (FRET) [5,[9][10][11][12][13]. Recently, Yuan et al reported plasmonic TiN nanoparticles enhanced lowthreshold random lasing from dye-doped nematic liquid crystals [13].…”