&lt;title&gt;Optical nonlinearities and optical limiting in GaP at 532 nm&lt;/title&gt;

Rychnovsky, S. J.; Allan, Graham; Venzke, C. H.; Smirl, Arthur L.; Boggess, Thomas F.

doi:10.1117/12.138062

Cited by 6 publications

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“…TPA materials widely studied are semiconductors, such as GaAs, with a band-gap energy greater than the photon energy of the light source, giving the desirable feature of high transmittance for low incident light. At high intensities, processes associated with TPA, including free carrier generation and absorption and defocusing caused by an induced change in refractive index, limit the throughput of the limiter. , TPA limiters include bulk semiconductor materials as well as semiconductor nanoparticles …”

Section: Resultsmentioning

confidence: 99%

Nonlinear Optical Transmission of Nanographene and Its Composites

et al. 2010

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The effects of the amount of nanographene on physical, mechanical, and thermal properties and morphology of the wood-plastic composites were investigated. This wood-plastic was made using recycled high density polyethylene (HDPE), nanographene, and wood flour. Four weight levels, 0, 0.5, 1.5, or 2.5 wt.% of nanographene, were combined with 70% polymeric matrix and 30% lignocellulosic material with an internal mixer. The results showed that by increasing the amount of nanographene up to 0.5% by weight, the flexural strength, flexural modulus, and notched impact strength of the composite increased. After adding 2.5 wt.% nanographene, these properties were reduced. By increasing the amount of nanographene, both the amount of residual ash and the thermal stability increased. Study of the images from scanning electron microscope (SEM) showed that the samples containing 0.5% of nanographene had less pores and were smoother than other samples.

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Section: Resultsmentioning

confidence: 99%

Nonlinear Optical Transmission of Nanographene and Its Composites

et al. 2010

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“…where β n (integer n 1) is the (n + 1)-photon absorption coefficient. Thus the normalized transmittance of the Zscan for the nonlinear medium can be obtained by combining equations ( 1)- (3). Combining these equations, we can get the quantities of interest n 2 and β n by fitting the experimental data.…”

Section: Resultsmentioning

confidence: 99%

“…Gallium phosphide (GaP) is a typical III-V semiconductor which has been used as a luminance diode [1], an acoustooptical modulator [2] and an optical limiter [3]. More recently, for terahertz generation and detection via femtosecond laser at 1040 nm, GaP has been the most commonly used material because it allows long working length [4], and thus using GaP as the emitter can scale up the energy of terahertz radiation pulses with very high pump power [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Three-photon absorption and Kerr nonlinearity in undoped bulk GaP excited by a femtosecond laser at 1040 nm

Liu

Xing

et al. 2010

J. Opt.

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A modified Z-scan method was used to achieve polarization-resolved measurement of nonlinear properties of undoped bulk GaP excited by a femtosecond laser at 1040 nm. The optical Kerr nonlinearities of ⟨100⟩-, ⟨110⟩- and ⟨111⟩-cut GaP slabs were characterized experimentally at room temperature. The open aperture Z-scan curves demonstrate that three-photon absorption in GaP dominates the nonlinear absorption processes under the experimental conditions. In addition, experimental results show that both three-photon absorption and Kerr nonlinearity of undoped GaP possess the same anisotropy and crystal orientation dependence.

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“…By using a simple optical system that utilizes an intermediate focal plane, thin films of GaP were investigated for OL. 367 Upon irradiation at 532 nm, with 25 ps pulses, GaP exhibited an output limiting level of less than 1 pJ/cm 2 . Also, an InP/ silicon-on-insulator hybrid photonic nanocavity was tested as an all-optical power limiter.…”

Section: Nanocrystalsmentioning

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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<title>Optical nonlinearities and optical limiting in GaP at 532 nm</title>

Cited by 6 publications

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Nonlinear Optical Transmission of Nanographene and Its Composites

Nonlinear Optical Transmission of Nanographene and Its Composites

Three-photon absorption and Kerr nonlinearity in undoped bulk GaP excited by a femtosecond laser at 1040 nm

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

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