Two-photon absorption and nonlinear refraction of birefringent mesoporous silicon films

Gayvoronsky, V. Ya.; Golovan, L. A.; Kopylovsky, M. A.; Gromov, Yu.V.; Zabotnov, S. V.; Piskunov, Nikolay; Кашкаров, П. К.; Timoshenko, V. Yu.

doi:10.1070/qe2011v041n03abeh014416

Cited by 8 publications

(7 citation statements)

References 3 publications

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“…The covering silicon natural oxide shell is close to stoichiometric SiO 2 [19] with low concentration of the deep traps and low surface density of the silanol groups. Their efficient NLO response can be observed at lower peak laser intensities (<3 MW/cm 2 ) that is out of scope of this study [6, 20]. …”

Section: Resultsmentioning

confidence: 99%

“…The NLO response of the trapped electrons was resonantly enhanced due to the proximity of the laser quanta energy eV to the trap depth eV [22]. An efficient NLO response of the trapped electrons for the anisotropic layers of mesoporous Si was observed in [6]. …”

Section: Resultsmentioning

confidence: 99%

“…The proposed method was successfully applied for the porous silicon NLO response studies [6]. In this paper the obtained total and on-axis transmittance dependencies are presented as the smoothed curves produced by local B-splines of measured data.…”

Section: Methodsmentioning

confidence: 99%

“…Such functionalization of the PS significantly impacts the electronic surface states, particularly saturates the dangling bonds that are normally located on PS surface (1 bond per 10 4 −10 5 atoms), and consequently changes the PS properties [5]. In recent studies of mesoporous Si [6], a high sensitivity of the laser pulses self-action effects to the surface electronic states excitation that related to the defects in the thin silicon oxide layer at the boundaries of nanocrystals and pores was shown. According to those results, in this paper we propose a new method based on monitoring of PS NLO response for sensing application.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Water Adsorption on Nonlinear Optical Properties of Functionalized Porous Silicon

et al. 2017

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The porous silicon (PS) surface modification diagnostics due to functionalization and water adsorption/desorption processes were provided by the self-action effects of picosecond range pulsed laser radiation at 1064 nm. It was shown that the PS surface functionalization—oxide removal, alkylation, and oxidation—resulted in a refractive nonlinear optical (NLO) response sign turn to self-focusing (Δn>0) versus the self-defocusing (Δn<0) observed in the aged PS. The sensitivity of the proposed technique was revealed to water adsorption/desorption from the chemically oxidized PS interface. For the dried PS, the self-defocusing effect with corresponding NLO cubic susceptibility Re(χ (3))∼−4.7·10−9 esu was observed versus the self-focusing one (∼5·10−8 esu) for the PS positioned in saturated water vapor at room temperature. The obtained results demonstrate high sensitivity and wide versatility of the proposed readout technique based on pulsed laser radiation self-action at 1064 nm to the PS surface modification monitoring/diagnostics applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of Water Adsorption on Nonlinear Optical Properties of Functionalized Porous Silicon

et al. 2017

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“…A sensitivity of the method is based on resonant electron excitation from the deep traps in the gap attributed to intrinsic oxygen vacancies [ 6 ] in the studied materials. The technique has been approved for metal oxide nanocomposite characterization with the similar oxygen vacancy occurrence depth in the gap [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Photoinduced refractive index variation within picosecond laser pulses excitation as the indicator of oxyorthosilicates single crystals composition modification

et al. 2015

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For the first time, the diagnostics of oxyorthosilicates single crystals based on self-action of picosecond range laser pulses at 1,064 nm (1.17 eV) has been performed. High sensitivity of the photoinduced refractive index variation to the substitution of the Lu atoms by Gd in the LSO/LGSO crystalline host as well as to the admixture of Ce was found. The effect can be explained with different electron detrapping-recombination process efficiencies due to the resonant electron excitation from the deep traps in the gap attributed to intrinsic oxygen vacancies.

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Nonlinear Optical Properties of Porous Silicon

Golovan

2018

Handbook of Porous Silicon

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Two-photon absorption and nonlinear refraction of birefringent mesoporous silicon films

Cited by 8 publications

References 3 publications

Impact of Water Adsorption on Nonlinear Optical Properties of Functionalized Porous Silicon

Impact of Water Adsorption on Nonlinear Optical Properties of Functionalized Porous Silicon

Photoinduced refractive index variation within picosecond laser pulses excitation as the indicator of oxyorthosilicates single crystals composition modification

Nonlinear Optical Properties of Porous Silicon

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