Two-photon-pumped lasing from colloidal nanocrystal quantum dots

Zhang, Chunfeng; Zhang, Fan; Tao, Zhu; Cheng, An; Xu, Jian; Zhang, Qi; Mohney, Suzanne E.; Henderson, Ron; Wang, Y. Andrew

doi:10.1364/ol.33.002437

Cited by 45 publications

(62 citation statements)

References 19 publications

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“…The magnitude of these TPA coefficients is comparable to literature data on solution and close-packed QD samples. [34,35] The corresponding σ TPA is 21 000 ± 4 700 GM in the thin-film, a value similar to that obtained in solution (16 000 ± 1400 GM). Consistent with previous reports, the TPA crosssections measured with z-scan are smaller than the ones measured by TPIF [36] .…”

Section: Introductionsupporting

confidence: 78%

Soft‐Lithographed Up‐Converted Distributed Feedback Visible Lasers Based on CdSe–CdZnS–ZnS Quantum Dots

Todescato

Fortunati

Gardin

et al. 2011

Adv Funct Materials

101

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The development of a solution-deposited up-converted distributed feedback laser prototype is presented. It employs a sol-gel silica/germania soft-lithographed microcavity and CdSe-CdZnS-ZnS quantum dot/sol-gel zirconia composites as optical gain material. Characterization of the linear and nonlinear optical properties of quantum dots establishes their high absorption cross-sections in the one-and two-photon absorption regimes to be 1 × 10 −14 cm 2 and 5 × 10 4 GM, respectively. In addition, ultrafast transient absorption dynamics measurements of the graded seal quantum dots reveal that the Auger recombination lifetime is 220 ps, a value two times higher than that of the corresponding CdSe core. These factors enable the use of such quantum dots as optically pumped gain media, operating in the one-and two-photon absorption regime. The incorporation of CdSe-CdZnSZnS quantum dots within a zirconia host matrix affords a quantum-dot ink that can be directly deposited on our soft-lithographed distributed feedback grating to form an all-solution-processed microcavity laser.

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Section: Introductionsupporting

confidence: 78%

Soft‐Lithographed Up‐Converted Distributed Feedback Visible Lasers Based on CdSe–CdZnS–ZnS Quantum Dots

Todescato

Fortunati

Gardin

et al. 2011

Adv Funct Materials

101

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“…Laser lines narrower than 1 nm were demonstrated with thresholds as low as 80 μJ/cm 2 (400 nm) and 8 mJ/cm 2 (800 nm). Lasing under two photon pumping was also demonstrated in [65] by using a close packed film of CdSe/ CdS/ZnS QDs (Fig. 5a).…”

Section: Lasingmentioning

confidence: 81%

Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites

Suárez¹

2016

Eur. Phys. J. Appl. Phys.

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Abstract. Semiconductor nanocrystals have arisen as outstanding materials to develop a new generation of optoelectronic devices. Their fabrication under simple and low cost colloidal chemistry methods results in cheap nanostructures able to provide a wide range of optical functionalities. Their attractive optical properties include a high absorption cross section below the band gap, a high quantum yield emission at room temperature, or the capability of tuning the band-gap with the size or the base material. In addition, their solution process nature enables an easy integration on several substrates and photonic structures. As a consequence, these nanoparticles have been extensively proposed to develop several photonic applications, such as detection of light, optical gain, generation of light or sensing. This manuscript reviews the great effort undertaken by the scientific community to construct active photonic devices based on these nanoparticles. The conditions to demonstrate stimulated emission are carefully studied by comparing the dependence of the optical properties of the nanocrystals with their size, shape and composition. In addition, this paper describes the design of different photonic architectures (waveguides and cavities) to enhance the generation of photoluminescence, and hence to reduce the threshold of optical gain. Finally, semiconductor nanocrystals are compared to organometallic halide perovskites, as this novel material has emerged as an alternative to colloidal nanoparticles.

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“…Among the different types of colloidal nanocrystals, core/shell heterostructures, consisting of a quantum dot (core) embedded in a nanoshell, predominantly with spherical and, more recently, with linear6 branched7 and platelet89 geometries, have been under vigorous research investigation for the development of microlasers10111213141516171819, fundamental studies of light–matter interactions and solid-state cavity quantum electrodynamic effects2021, where the end goal is to realize functions, such as entanglement of distinguishable quantum systems and controlled coherent coupling. The potential of these nanostructures in lasing applications with respect to bare quantum dots relies on their ability to reduce surface/interface defects and suppress non-radiative Auger recombination effects, as it has been demonstrated using different approaches, involving the use of shells with large thickness or gradual composition, or engineering of the carrier wavefunctions in the volume of the nanostructure22232425.…”

mentioning

confidence: 99%

Single-mode tunable laser emission in the single-exciton regime from colloidal nanocrystals

et al. 2013

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Whispering-gallery-mode resonators have been extensively used in conjunction with different materials for the development of a variety of photonic devices. Among the latter, hybrid structures, consisting of dielectric microspheres and colloidal core/shell semiconductor nanocrystals as gain media, have attracted interest for the development of microlasers and studies of cavity quantum electrodynamic effects. Here we demonstrate single-exciton, single-mode, spectrally tuned lasing from ensembles of optical antenna-designed, colloidal core/shell CdSe/CdS quantum rods deposited on silica microspheres. We obtain single-exciton emission by capitalizing on the band structure of the specific core/shell architecture that strongly localizes holes in the core, and the two-dimensional quantum confinement of electrons across the elongated shell. This creates a type-II conduction band alignment driven by coulombic repulsion that eliminates non-radiative multi-exciton Auger recombination processes, thereby inducing a large exciton–bi-exciton energy shift. Their ultra-low thresholds and single-mode, single-exciton emission make these hybrid lasers appealing for various applications, including quantum information processing.

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Two-photon-pumped lasing from colloidal nanocrystal quantum dots

Cited by 45 publications

References 19 publications

Soft‐Lithographed Up‐Converted Distributed Feedback Visible Lasers Based on CdSe–CdZnS–ZnS Quantum Dots

Soft‐Lithographed Up‐Converted Distributed Feedback Visible Lasers Based on CdSe–CdZnS–ZnS Quantum Dots

Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites

Single-mode tunable laser emission in the single-exciton regime from colloidal nanocrystals

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