Coherence buildup and laser thresholds from nanolasers to macroscopic lasers

Carroll, Mark Anthony; D’Alessandro, Giampaolo; Lippi, G. L.; Oppo, Gian-Luca; Papoff, F.

doi:10.1103/physreva.107.063710

Cited by 4 publications

(1 citation statement)

References 41 publications

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“…81,91 Before concluding this concise discussion on models, it is crucial to emphasize that, despite their simplicity, they effectively capture the essential features essential for our current investigation. A comparison with recent quantum-mechanical models, 93,94 capable of predicting additional quantum features such as photon-number squeezing, 2 demonstrates the robustness of RESE and SLS, provided the threshold concept is correctly interpreted. 81…”

Section: Modelling Equationsmentioning

confidence: 98%

Nanolaser potential in communications and data handling

Puccioni,

Wang,

Lippi

2024

Semiconductor Lasers and Laser Dynamics XI

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The pivotal role played by semiconductor lasers in telecommunications and data storage applications requires dealing with time lag and relaxation oscillations, which limit bandwidth and reliability. As an alternative to the mitigation measures traditionally employed, we analyze the potential of size downscaling and investigate the intrinsic physical features of lasers down to the nanoscale. An analysis of the dynamical properties as a function of scale, with standard models, highlights the intrinsic potential of nanolasers as advantageous sources of light for information. Noise response and characteristic times strongly confirm that considerable gain can be obtained from small devices, thus encouraging efforts directed at solving technological hurdles.

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Section: Modelling Equationsmentioning

confidence: 98%

Nanolaser potential in communications and data handling

Puccioni,

Wang,

Lippi

2024

Semiconductor Lasers and Laser Dynamics XI

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The Onset of Lasing in Semiconductor Nanolasers

Saldutti,

Yu,

Mørk

2024

Laser & Photonics Reviews

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Nanolasers based on emerging dielectric cavities with deep sub‐wavelength confinement of light offer a large light‐matter coupling rate and near‐unity spontaneous emission factor, . These features call for reconsidering the standard approach to identifying the lasing threshold. Here, a new threshold definition is suggested, taking into account the recycling process of photons when is large. This threshold reduces to the classical balance between gain and loss in the limit of macroscopic lasers, but qualitative as well as quantitative differences emerge for nanolasers. In particular, this new threshold identifies the onset of a transition regime, where the quantum statistics of the emitted light evolve into the Poissonian statistics of a coherent state. It is shown that the threshold with photon recycling consistently marks the onset of the change in the second‐order intensity correlation, , toward coherent laser light, irrespective of the laser size and down to the case of a single emitter. In contrast, other threshold definitions may well predict lasing in light‐emitting diodes. An overview of different threshold definitions proposed in the literature is provided and their predictions are compared when going from macroscopic to microscopic lasers.

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Statistics and dynamics in micro- and nanolasers

Puccioni,

Wang,

Lippi

2024

Semiconductor Lasers and Laser Dynamics XI

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We consider two issues concerning the dynamics of nanolasers: the impact of their large noise on the deterministic trajectories and the interpretation of the statistical results coming from the photon statistics. The second issue, due to the lack of sufficiently sensitive and fast detectors, represents an unavoidable bottleneck in the analysis of any dynamics and is discussed in detail. Our study reveals several important results. Statistics and dynamics provide complementary information, but the former is not able to reliably distinguish different dynamical regimes. Inferring a coherence emission regime, or degree of coherence, from autocorrelation functions is fraught with interpretative traps. Finally, we address the challenge posed by external noise, which dramatically distorts the statistical information derived from the autocorrelations. We introduce an empirical indicator capable of identifying the lowest pump value from which autocorrelation values become reliable, based on a single sequence of noisy data that can be applied to the same-time, second-order autocorrelation function. This indicator is a valuable tool for experimentalists.

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Coherence buildup and laser thresholds from nanolasers to macroscopic lasers

Cited by 4 publications

References 41 publications

Nanolaser potential in communications and data handling

Nanolaser potential in communications and data handling

The Onset of Lasing in Semiconductor Nanolasers

Statistics and dynamics in micro- and nanolasers

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