Tailoring the strong coupling regime in III‐nitride based microcavities for room temperature polariton laser applications

Levrat, Jacques; Butté, R.; Christmann, Gabriel; Feltin, E.; Carlin, J.-F.; Grandjean, N.

doi:10.1002/pssc.200982563

Cited by 8 publications

(6 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The depletion of the polariton condensate occurs both through spontaneous radiative recombination and by the absorption of acoustic phonons, which brings exciton-polaritons back to k−states beyond the inflection point of the lower polariton branch (LPB). 42,43 We neglect other mechanisms of depletion of the condensate (e.g., due to polariton-polariton scattering) assuming they are less probable.…”

mentioning

confidence: 99%

Generic picture of the emission properties of III-nitride polariton laser diodes: Steady state and current modulation response

et al. 2012

Self Cite

View full text Add to dashboard Cite

The main emission characteristics of electrically-driven polariton lasers based on planar GaN microcavities with embedded InGaN quantum wells are studied theoretically. The polariton emission dependence on pump current density is first modeled using a set of semi-classical Boltzmann equations for the exciton-polaritons that are coupled to the rate equation describing the electron-hole plasma population. Two experimentally relevant pumping geometries are considered, namely the direct injection of electrons and holes into the strongly coupled microcavity region and intracavity optical pumping via an embedded light-emitting diode. The theoretical framework allows the determination of the minimum threshold current density J thr,min as a function of lattice temperature and exciton-cavity photon detuning for the two pumping schemes. A J thr,min value of 5 Acm −2 and 6 Acm −2 is derived for the direct injection scheme and for the intracavity optical pumping one, respectively, at room temperature at the optimum detuning. Then an approximate quasi-analytical model is introduced to derive solutions for both the steady-state and high-speed current modulation. This analysis makes it possible to show that the exciton population, which acts as a reservoir for the stimulated relaxation process, gets clamped once the condensation threshold is crossed, a behavior analogous to what happens in conventional laser diodes with the carrier density above threshold. Finally the modulation transfer function is calculated for both pumping geometries and the corresponding cutoff frequency is determined.

show abstract

mentioning

confidence: 99%

Generic picture of the emission properties of III-nitride polariton laser diodes: Steady state and current modulation response

et al. 2012

Self Cite

View full text Add to dashboard Cite

show abstract

“…Typical values of Rabi splitting , exciton Bohr radius a B , and dielectric constant ε are taken from Ref. ( 9 , 10 , 11 , 19 , 20 , 21 , 22 , 23 , 24 ).…”

Section: Resultsmentioning

confidence: 99%

Single and double bosonic stimulation of THz emission in polaritonic systems

Kaliteevski

Иванов

Pozina

et al. 2014

Sci Rep

View full text Add to dashboard Cite

The influence of the surrounding cavity on the efficiency of different types of polaritonic emitters of THz radiation has been analysed. It is demonstrated that THz lasing threshold in realistic structures cannot be achieved without a THz cavity, due to destruction of polaritons via excitonic Mott transition. Even modest values of cavity quality factor (not exceeding 50) provide significant quantum efficiency.

show abstract

“…At RT, the thermally activated escape mechanism of the ground state polaritons is stronger and can compete with the polariton relaxation process. 44 Therefore, a deeper polariton trap formed by a larger negative detuning is essential for preventing the ground-state polaritons from escaping through thermal energy. Thus, we performed an ARPL measurement with a frequency-tripled Nd:YVO 4 pulsed laser at two different detunings, d52109 meV and d5239 meV, to better demonstrate the RT polariton lasing.…”

Section: Polariton Lasing At Room Temperaturementioning

confidence: 99%

Strong light–matter interaction in ZnO microcavities

2013

View full text Add to dashboard Cite

The strong light-matter interaction in ZnO-embedded microcavities has received great attention in recent years, due to its ability to generate the robust bosonic quasiparticles, exciton-polaritons, at or above room temperature. This review introduces the strong coupling effect in ZnO-based microcavities and describes the recent progress in this field. In addition, the report contains a systematic analysis of the room-temperature strong-coupling effects from relaxation to polariton lasing. The stable room temperature operation of polaritonic effects in a ZnO microcavity promises a wide range of practical applications in the future, such as ultra-low power consumption coherent light emitters in the ultraviolet region, polaritonic transport, and other fundamental of quantum optics in solid-state systems. Keywords: microcavity; polariton; strong coupling; ZnO INTRODUCTIONOver the past two decades, strong light-matter interactions in solidstate systems have garnered much attention for applications in novel photonics devices. The polariton is the key factor in the strong coupling phenomena: a new bosonic quasiparticle that is a hybrid between matter and light and exhibits promise for investigating various fascinating effects including dynamical Bose condensation, 1-4 superfluidity 5,6 and quantized vortices. 7-10 Semiconductor microcavities (MCs), which simultaneously offer good optical confinement with a small mode volume for the photonics portion and an excitonic layer for the matter portion of the strong coupling, are regarded as promising candidates for demonstrating and manipulating strong light-matter coupling in solid-state systems. 11 Because the semiconductor MCs undergo a strong coupling regime, the coupling rate between the bared exciton modes and the confined photon modes is faster than their dissipation rates. Compared with weakly coupled MCs, the rapid exchange rate in strongly coupled MCs renders the energy transfer between the excitons and photons reversible and reduces the possibility of energy dissipation through non-radiative channels, which results in a higher internal quantum efficiency. The new eigenstates generated from the strong exciton-photon coupling are called exciton-polaritons 12 and exhibit a relatively small effective mass compared with atomic hydrogen, tunable dispersion curves, and the bosonic statistics at low densities.Given the aforementioned properties, many phenomena have been extensively studied in polariton systems, including ultra-low threshold polariton lasing, 13 polariton parametric oscillation 14-17 and polaritonic circuits. 18 The matter characteristic of the polaritons allows them to scatter with electrons, phonons and polaritons, then to condense in the coherent ground state. The laser-like light emission from a coherent polariton ground state, the so-called polariton laser, does not require the population inversion condition required by conventional

show abstract

Tailoring the strong coupling regime in III‐nitride based microcavities for room temperature polariton laser applications

Cited by 8 publications

References 23 publications

Generic picture of the emission properties of III-nitride polariton laser diodes: Steady state and current modulation response

Generic picture of the emission properties of III-nitride polariton laser diodes: Steady state and current modulation response

Single and double bosonic stimulation of THz emission in polaritonic systems

Strong light–matter interaction in ZnO microcavities

Contact Info

Product

Resources

About