Cavity-enhanced stimulated emission cross section in polymer microlasers

Djiango, Martin; Kobayashi, Takeyuki; Blau, Werner J.

doi:10.1063/1.2999584

Cited by 16 publications

(7 citation statements)

References 15 publications

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“…It is noteworthy that, contrary to the seminal work of Yokohama et al [39], most of recently reported rate-equation models mainly focus on the enhancement of spontaneous emission [13], [29], [30], neglecting that stimulated emission is directly linked to spontaneous emission, as it is readily seen in the Einstein's relations or by the derivation of the light-matter interaction in the quantized field picture. Several experimental studies also report the enhancement of the stimulated emission, like for example in microdroplets [50], microlasers [51], and nanowire lasers [52], confirming that it should be treated on the same footing as the spontaneous emission. In the case of a nanolaser, this can result in a Purcell enhancement of the stimulated emission which influences the threshold of the laser, as theoretically investigated in the case of spectrally-narrow emitters [53], and as reported in a recent experimental work on subwavelength red-emitting hybrid plasmonic lasers [54].…”

Section: Introductionmentioning

confidence: 70%

Purcell Effect in the Stimulated and Spontaneous Emission Rates of Nanoscale Semiconductor Lasers

Romeira

Fiore

2018

IEEE J. Quantum Electron.

103

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Nanoscale semiconductor lasers have been developed recently using either metal, metallo-dielectric or photonic crystal nanocavities. While the technology of nanolasers is steadily being deployed, their expected performance for on-chip optical interconnects is still largely unknown due to a limited understanding of some of their key features. Specifically, as the cavity size is reduced with respect to the emission wavelength, the stimulated and the spontaneous emission rates are modified, which is known as the Purcell effect in the context of cavity quantum electrodynamics. This effect is expected to have a major impact in the 'threshold-less' behavior of nanolasers and in their modulation speed, but its role is poorly understood in practical laser structures, characterized by significant homogeneous and inhomogeneous broadening and by a complex spatial distribution of the active material and cavity field. In this work, we investigate the role of Purcell effect in the stimulated and spontaneous emission rates of semiconductor lasers taking into account the carriers' spatial distribution in the volume of the active region over a wide range of cavity dimensions and emitter/cavity linewidths, enabling the detailed modeling of the static and dynamic characteristics of either micro-or nano-scale lasers using single-mode rate-equations analysis. The ultimate limits of scaling down these nanoscale light sources in terms of Purcell enhancement and modulation speed are also discussed showing that the ultrafast modulation properties predicted in nanolasers are a direct consequence of the enhancement of the stimulated emission rate via reduction of the mode volume.

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Section: Introductionmentioning

confidence: 70%

Purcell Effect in the Stimulated and Spontaneous Emission Rates of Nanoscale Semiconductor Lasers

Romeira

Fiore

2018

IEEE J. Quantum Electron.

103

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“…8 This work simply assumed that the necessary condition was fulfilled and did not treat the eDOS. On the experimental side, cavity-enhanced StE was observed with lasing in rhodamine6G-ethanol droplets 7 and in polymer microrings, 6 materials with insufficient gain for lasing in the absence of gain enhancement.…”

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confidence: 97%

Quantum-dot nano-cavity lasers with Purcell-enhanced stimulated emission

Gregersen

Suhr

Lorke

et al. 2012

Applied Physics Letters

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We present a rate equation model for quantum-dot light-emitting devices that take into account Purcell enhancement of both spontaneous emission and stimulated emission as well as the spectral profile of the optical and electronic density-of-states. We find that below threshold the β-factor in a quantum-dot nanolaser depends strongly on the pump. For quantum dots with linewidth comparable to that of the cavity, we then show that an otherwise non-lasing device can lase due to Purcell enhancement of the stimulated emission. Finally, we compare the rate equation model to a microscopic model and obtain good agreement.

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“…The the cavity. It is important to point out that experimental investigations related to both, dielectric microlasers [44,45] and plasmonic lasers [32,33], have reported an enhancement in the stimulated emission rate resulting from the Purcell effect, whereby the gain provided by the molecular medium is enhanced by a factor equal to the Purcell factor of the cavity [44]. As this effect is not completely taken into account in our simulations, and our structure exhibits an averaged Purcell factor of ∼ 2.2 over the gain medium (see supplementary material), we expect that the molecular concentration and pump requirements predicted by our simulations are overestimated.…”

Section: B Active Structurementioning

confidence: 99%

High-Q plasmonic crystal laser for ultra-sensitive biomolecule detection

Sun

Wang

Jafari

et al. 2020

Preprint

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Plasmonic lasers provide a paradigm-changing approach for the generation of coherent light at the nanoscale. In addition to the usual properties of coherent radiation, the emission of plasmonic lasers can feature high sensitivity to the surrounding environment, which makes this technology attractive for developing high-performance and highly-integrated sensing devices. Here, we investigate a plasmonic laser architecture based on a high-Q plasmonic crystal consisting of a periodic arrangement of nanoholes on a thin gold film cladded with an organic-dye-doped SiO2 gain layer as the gain material. We report an extensive full-wave numerical analysis of the device's lasing performance and its application as a biochemical sensor, showing that the proposed design features excellent figures of merit for surface sensing that in principle can be over an order of magnitude larger than those of previously reported high-performance plasmonic biosensor architectures.

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Cavity-enhanced stimulated emission cross section in polymer microlasers

Cited by 16 publications

References 15 publications

Purcell Effect in the Stimulated and Spontaneous Emission Rates of Nanoscale Semiconductor Lasers

Purcell Effect in the Stimulated and Spontaneous Emission Rates of Nanoscale Semiconductor Lasers

Quantum-dot nano-cavity lasers with Purcell-enhanced stimulated emission

High-Q plasmonic crystal laser for ultra-sensitive biomolecule detection

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