Evaluation of nonlinear optical properties of cadmium chalcogenide nanomaterials

Seo, Jaetae; Yang, Q.; Creekmore, S.; Temple, D.; Qu, Lianhua; Yu, William W.; Wang, A; Peng, Xiaogang; Mott, Andrew G.; Namkung, M.; Jung, Sung‐Soo; Kim, J.H

doi:10.1016/s1386-9477(02)00714-2

Cited by 7 publications

(5 citation statements)

References 2 publications

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“…Some authors have demonstrated the dependency of optical properties on size distribution of CdSe crystals. , Other groups reported large TPA using thin films of CdSe nanocrystals embedded in a PMMA polymer host . The latter represented the first report of photon-number noise reduction by multiphoton absorption in a semiconducting nanostructured material.…”

Section: Inorganic Materialsmentioning

confidence: 99%

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

2016

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The control of luminous radiation has extremely important implications for modern and future technologies as well as in medicine. In this Review, we detail chemical structures and their relevant photophysical features for various groups of materials, including organic dyes such as metalloporphyrins and metallophthalocyanines (and derivatives), other common organic materials, mixed metal complexes and clusters, fullerenes, dendrimeric nanocomposites, polymeric materials (organic and/or inorganic), inorganic semiconductors, and other nanoscopic materials, utilized or potentially useful for the realization of devices able to filter in a smart way an external radiation. The concept of smart is referred to the characteristic of those materials that are capable to filter the radiation in a dynamic way without the need of an ancillary system for the activation of the required transmission change. In particular, this Review gives emphasis to the nonlinear optical properties of photoactive materials for the function of optical power limiting. All known mechanisms of optical limiting have been analyzed and discussed for the different types of materials.

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Section: Inorganic Materialsmentioning

confidence: 99%

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

2016

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“…Nevertheless, the magnitude and frequency dependence of the nonlinear refractive index, n 2 , and the two-photon absorption coefficient, β, are less well understood. Some authors have experimentally determined that QDs exhibit n 2 and β with the same order of magnitude and similar dispersion to those of bulk materials [3,4], however other authors have reported results for n 2 and β which differ significantly from those predicted by theories for the bulk [5,6]. Additionally, Duarte et.…”

Section: Introductionmentioning

confidence: 95%

Two-photon absorption in CdTe quantum dots

Padilha¹,

Fu²,

Hagan³

et al. 2005

Opt. Express

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We report measurements of frequency degenerate and nondegenerate two-photon absorption (2PA) spectra of CdTe quantum dots, QDs, in glass matrices and compare them with 2PA in bulk CdTe. We find that the 2PA is strongly dependent on the size of the QDs becoming smaller with decreasing size, even when normalizing to the volume of the dots. We adapt a simple degenerate 2PA model, based on the effective mass approximation, to nondegenerate 2PA, and this model correctly describes the experimental data for 2-photon energies up to ~ 1.4Eg. This suggests that, once the spectrum for one size of quantum dot is known, the model can be used for predicting the degenerate and nondegenerate 2PA spectra of different sized QDs of the same semiconductor.

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“…Estimates of the three-photon absorption coefficient for bulk materials are at least two orders of magnitude less than the three-photon absorption coefficient observed in this experiment. 12 However, such differences have been observed, 2,4,5 and could here be from a combination of resonant enhancements to the electronic nonlinearities, as well as other types of nonlinearities not explored by the current model. Using Eq.…”

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confidence: 74%

“…In particular, a recent study of the nonlinearities of CdSe quantum dots ͑essentially the same sample types as studied in this work͒ showed that the nonlinear properties were very similar to the bulk properties. 3 Several other studies 2,4,5 show instead that the nonlinear properties of the quantum dots differ greatly from those of the bulk material, and are critically dependent on dot size. The findings of this work are in line with these studies, seeing strongly size-dependent nonlinearities.…”

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confidence: 99%

Three-photon absorption for nanosecond excitation in cadmium selenide quantum dots

2007

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We experimentally observe saturable absorption and dramatic three-photon absorption in various colloidal solutions of cadmium selenide quantum dots, with a strong size dependence witnessed for these properties. We also develop a model for the electronic portion of the nonlinearities that illustrates well the trends exhibited by our experimental data. The model incorporates six bands ͑three each in the valence and conduction bands͒.

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Evaluation of nonlinear optical properties of cadmium chalcogenide nanomaterials

Cited by 7 publications

References 2 publications

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

Two-photon absorption in CdTe quantum dots

Three-photon absorption for nanosecond excitation in cadmium selenide quantum dots

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