Observation of a large third-order nonlinear response of exciton polaritons in GaAs thin film

Akiyama, Kouichi; Tomita, Naohide; Nomura, Y.; Isu, Toshiro

doi:10.1063/1.124413

Cited by 58 publications

(47 citation statements)

References 22 publications

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“…For example, degenerate four-wave mixing (DFWM), which is one of the most important nonlinear optical processes, is greatly enhanced with the transition associated with the nondipole type polarization pattern [5]. This effect is actually observed in the experiment with GaAs thin films [6,7]. In addition, the observation of nonmonotonic size depend-www.pss-b.com…”

Section: Introductionmentioning

confidence: 81%

Ultrafast degenerate four‐wave mixing in CuCl ultrathin films

Ichimiya¹,

Ashida²,

Yasuda³

et al. 2006

Physica Status Solidi (b)

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Degenerate four-wave mixing (DFWM) spectra of CuCl thin films with high crystalline quality and with thicknesses in the order of hundreds of nanometers have been investigated. We found that the several components appear with the enormous radiative shift below the transverse exciton energy in the DFWM spectrum and succeeded in demonstrating that the energy of each component is in good agreement with the eigenenergy for the mode structure of a size-dependent exciton -radiation coupled system. The ultrafast response time of DFWM around 100 fs is observed in a thin film with a thickness of 187 nm, which reflects the theoretically predicted and extremely large radiative width.

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Section: Introductionmentioning

confidence: 81%

Ultrafast degenerate four‐wave mixing in CuCl ultrathin films

Ichimiya¹,

Ashida²,

Yasuda³

et al. 2006

Physica Status Solidi (b)

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“…11,50-52 Moreover, optical responses explicitly reflects the confinement of center-of-mass motion of excitons in nano-structured materials and also in the nanoto-bulk crossover regime, [17][18][19][20][26][27][28][29][30][31][32][33][34][35][36] which we investigate in the present paper.…”

Section: 43mentioning

confidence: 99%

“…Actually, owing to the recent development of nanoscale fabrication, anomalous nonlinear optical processes have been reported in semiconductor nano-structures and in the nano-to-bulk crossover regime. 17,[26][27][28][29][30][31][32][33][34][35][36] Further, it shows a rapid radiative decay rate of excitons on the order of 100 fs due to the exciton superradiance.…”

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confidence: 99%

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Generation of entangled-photon pairs from biexcitons in CuCl thin films: Nano-to-bulk crossover regime

Bamba¹,

Ishihara²

2011

Phys. Rev. B

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We have constructed a theoretical framework of the biexciton-resonant hyperparametric scattering for the pursuit of high-power and high-quality generation of entangled photon pairs. Our framework is applicable to nano-to-bulk crossover regime where the center-of-mass motion of excitons and biexcitons is confined. Material surroundings and the polarization correlation of generated photons can be considered. We have analyzed the entangled-photon generation from CuCl film, by which ultraviolet entangled-photon pairs are generated, and from dielectric microcavity embedding a CuCl layer. We have revealed that in the nano-to-bulk crossover regime we generally get a high performance from the viewpoint of statistical accuracy, and the generation efficiency can be enhanced by the optical cavity with maintaining the high performance. The nano-to-bulk crossover regime has a variety of degrees of freedom to tune the entangled-photon generation, and the scattering spectra explicitly reflect quantized exciton-photon coupled modes in the finite structure.

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“…beyond the long wavelength approximation). It is known that anomalous nonlinear optical phenomena appear in nano-structures where excitons are weakly confined [9][10][11][12][13]. Savasta, Stefano, and Girlanda (SSG) have introduced the nonlocality to the QED theory for dispersive and absorptive dielectrics or excitonic systems [7].…”

Section: Introductionmentioning

confidence: 99%

QED theory for excitons with microscopic nonlocality

Bamba

Ishihara

2008

Phys. Status Solidi (c)

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We have constructed QED theory for excitons with microscopic nonlocality or nonlocal susceptibility originating from their center‐of‐mass motion. The nonlocality must be properly considered in excitons' weak (center‐of‐mass) confinement regime where the long wavelength approximation is breakdown. This theory keeps good correspondences with its underlying theories, the QED theory for dispersive and absorptive local dielectrics and the microscopic nonlocal theory developed in the semiclassical framework. Our theory provides correlation functions of excitons, which renormalize radiative shift, transition between exciton states via electromagnetic fields, radiative and nonradiative relaxation processes. By using these functions, we can systematically study various nonlinear, dephasing, and emission processes of excitons in weak‐confinement to bulk‐like systems

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Observation of a large third-order nonlinear response of exciton polaritons in GaAs thin film

Cited by 58 publications

References 22 publications

Ultrafast degenerate four‐wave mixing in CuCl ultrathin films

Ultrafast degenerate four‐wave mixing in CuCl ultrathin films

Generation of entangled-photon pairs from biexcitons in CuCl thin films: Nano-to-bulk crossover regime

QED theory for excitons with microscopic nonlocality

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