Green Perovskite Distributed Feedback Lasers

Harwell, Jonathon R.; Whitworth, Guy L.; Turnbull, Graham A.; Samuel, Ifor D. W.

doi:10.1038/s41598-017-11569-3

Cited by 77 publications

(84 citation statements)

References 28 publications

(20 reference statements)

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“…The same approach was also used in order to optimize the ASE properties of MAPbBr 3 films, as a preliminary step for the realization of Distributed Feedback (DFB) lasers [18], resulting in comparable ASE threshold values of the NCP film.…”

Section: Perovskites Bulk Polycrystalline Thin Filmsmentioning

confidence: 99%

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Amplified Spontaneous Emission and Lasing in Lead Halide Perovskites: State of the Art and Perspectives

Giorgi

Anni

2019

Applied Sciences

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Lead halide perovskites are currently receiving increasing attention due to their potential to combine easy active layers fabrication, tunable electronic and optical properties with promising performance of optoelectronic and photonic device prototypes. In this paper, we review the main development steps and the current state of the art of the research on lead halide perovskites amplified spontaneous emission and on optically pumped lasers exploiting them as active materials.

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Section: Perovskites Bulk Polycrystalline Thin Filmsmentioning

confidence: 99%

“…(d,e) Photograph of the output beam of a MAPbBr 3 DFB laser projected on a screen, (d) shows the TM mode from a 300 nm grating, while (e) shows the TE mode from a 290 nm grating. (d,e) adapted with permission from [18]. Springer Nature Publishing, 2017.…”

Section: Distributed Feedback (Dfb) Lasersmentioning

confidence: 99%

Amplified Spontaneous Emission and Lasing in Lead Halide Perovskites: State of the Art and Perspectives

Giorgi

Anni

2019

Applied Sciences

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“…Among all such direct-gap semiconductors, the organicinorganic lead-halide perovskites have recently attracted huge interest due to their outstanding photovoltaic performances 30 and high photoluminescence quantum efficiencies 1,[31][32][33][34][35][36][37] . Numerous studies focused on understanding the extent to which the exciton concept describes the photophysics of these systems [38][39][40][41] .…”

mentioning

confidence: 99%

Mahan excitons in room-temperature methylammonium lead bromide perovskites

et al. 2020

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In a seminal paper, Mahan predicted that excitonic bound states can still exist in a semiconductor at electron-hole densities above the insulator-to-metal Mott transition. However, no clear evidence for this exotic quasiparticle, dubbed Mahan exciton, exists to date at room temperature. In this work, we combine ultrafast broadband optical spectroscopy and advanced many-body calculations to reveal that organic-inorganic lead-bromide perovskites host Mahan excitons at room temperature. Persistence of the Wannier exciton peak and the enhancement of the above-bandgap absorption are observed at all achievable photoexcitation densities, well above the Mott density. This is supported by the solution of the semiconductor Bloch equations, which confirms that no sharp transition between the insulating and conductive phase occurs. Our results demonstrate the robustness of the bound states in a regime where exciton dissociation is otherwise expected, and offer promising perspectives in fundamental physics and in room-temperature applications involving high densities of charge carriers.

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“…[ 21 ] The creation of this resonance can be explained by the 2D confinement leading to a superposition of the two orthogonally oriented in‐plane grating vectors. [ 22 ] The well‐defined emission and hence spatial coherence provide additional evidence for lasing from our structures.…”

Section: Laser Beam Properties Of Dfb Egfp Lasersmentioning

confidence: 90%

Distributed Feedback Lasers Based on Green Fluorescent Protein and Conformal High Refractive Index Oxide Layers

Karl

Meek

Murawski

et al. 2020

Laser & Photonics Reviews

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Fluorescent proteins have emerged as an attractive gain material for lasers, especially for devices requiring biocompatibility. However, due to their optical properties, integration with distributed feedback (DFB) resonators is not readily achievable. Here, a DFB laser with enhanced green fluorescent protein (eGFP) as the gain material is demonstrated by incorporating a thin (65 nm), high refractive index (n = 2.12) ZrO2 interlayer as waveguide core. Deposition of ZrO2 via atomic layer deposition yields a smooth and conformal film as required to minimize optical losses. Lasing emission is obtained from 2D second‐order DFB eGFP lasers at pump power densities above 56.6 kW cm–2 and a wavelength tuning range of Δλ = 51.7 nm is demonstrated. Furthermore, it is shown that in contrast to conventional organic DFB lasers, both transverse electric (TE) and transverse magnetic (TM) modes are accessible. The effective refractive index of these modes can be predicted accurately through optical modelling. Using far‐field imaging, the laser beam profile is studied and TE and TM modes are distinguished.

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Green Perovskite Distributed Feedback Lasers

Cited by 77 publications

References 28 publications

Amplified Spontaneous Emission and Lasing in Lead Halide Perovskites: State of the Art and Perspectives

Amplified Spontaneous Emission and Lasing in Lead Halide Perovskites: State of the Art and Perspectives

Mahan excitons in room-temperature methylammonium lead bromide perovskites

Distributed Feedback Lasers Based on Green Fluorescent Protein and Conformal High Refractive Index Oxide Layers

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