Optical, structural and electrical properties of pure and urea doped KDP crystals

Babu, B.; Chandrasekaran, J.; Balaprabhakaran, S.; Ilayabarathi, P.

doi:10.2478/s13536-012-0082-4

Cited by 22 publications

(7 citation statements)

References 10 publications

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“…In these polarizations, space charge polarization depends on the perfection and purity of the sample. Thus, in the present system space charge polarization is active at the low frequency region and high temperature [18,19]. The variation of dielectric loss with log frequency is shown in Fig.…”

Section: Dielectric Studiesmentioning

confidence: 71%

Structural, spectral, electrical, Z-scan and HOMO LUMO studies on new 2-amino-6-methylpyridinium 2-hydroxybenzoate crystal

Punithaveni¹,

Thilagavathy²,

Muthukumarasamy³

et al. 2018

Materials Science-Poland

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New organic single crystals of 2-amino-6-methylpyridinium 2-hydroxybenzoate (2A6M2H) were grown by slow evaporation solution growth technique at room temperature. The grown crystal structure was studied using single crystal XRD. Crystalline nature and phases were confirmed by powder XRD analysis. FT-IR study was used to identify the functional groups present in the compound. UV-Vis study revealed that the lower cut off wavelength of the crystal is at 350 nm. The dielectric studies indicated the low value of dielectric loss at high frequency. Mechanical properties of the crystals were studied using Vickers microhardness test. The Z-Scan studies were conducted for the crystal using He-Ne laser.

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Section: Dielectric Studiesmentioning

confidence: 71%

Structural, spectral, electrical, Z-scan and HOMO LUMO studies on new 2-amino-6-methylpyridinium 2-hydroxybenzoate crystal

Punithaveni¹,

Thilagavathy²,

Muthukumarasamy³

et al. 2018

Materials Science-Poland

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“…The thickness of the pellet is 2.434 mm. The samples were sandwiched between copper electrodes with the help of a pressure contact [21]. The current was measured with respect to the applied voltage across the sample at different temperatures.…”

Section: Resultsmentioning

confidence: 99%

Comparative study of pure polyaniline with various oxidants by a template free method

Ashokan

Ponnuswamy

Jayamurugan

2015

Materials Science in Semiconductor Processing

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“…The negative photo conducting nature suggest that EDAPA crystal can be very much useful for IR detector applications and optical limiter for NIR lasers . The materials that exhibit low dielectric constant and loss at higher frequencies can be employed in electro‐optic applications such as DAST and optical limiters . The dielectric studies were measured for grown EDAPA crystal using Hioki 3535–50 LCR HITESTER in the range from 50 Hz to 5 MHz at different temperatures.…”

Section: Quantum Chemical Studiesmentioning

confidence: 99%

“…[35] The materials that exhibit low dielectric constant and loss at higher frequencies can be employed in electro-optic applications such as DAST and optical limiters. [36] The dielectric studies were measured for grown EDAPA crystal using Hioki 3535-50 LCR HITESTER in the range from 50 Hz to 5 MHz at different temperatures. A parallel capacitor has been designed by placing the grown crystal between two copper electrodes.…”

Section: Photoconductivity and Dielectric Studiesmentioning

confidence: 99%

Anisotropic Nonlinear Optical and Optical Limiting Studies of an Ethylenediamminium Picrate Crystal with Femtosecond Excitation

Chandrasekar¹,

Rajan²,

Soma

et al. 2020

ChemistrySelect

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Femtosecond laser excitation (800 nm, ∼150 fs, 80 MHz) induced anisotropic nonlinear optical behaviour and optical limiting action of ethylenediamminium picrate (EDAPA) crystal along two prominent orientations (2 0 0) and (1 1 1) was studied using the Z‐scan technique. EDAPA exhibited reverse saturable type nonlinear absorption ascribed to two‐photon absorption (2PA) process and self‐defocusing based on nonlinear refraction. Intensity dependent nonlinear absorption studies portray the 2PA coefficient is independent of the peak intensity of excitation. Frontier molecular orbitals studies revealed the non‐availability of real states at laser excitation (1.55 eV) and the measured energy gap of 3.18 eV avails the energy states for simultaneous absorption of two photons involving virtual states leading to the occurrence of genuine 2PA. In addition, using molecular electrostatic potential (MEP) analyses polarizability (5.30×10−24 esu) and dipole moment (7.317 Debye) were calculated using the density functional theory. A variation in the NLO coefficients with respect to orientation of excitation arises due to the anisotropy of the crystal. EDAPA crystal along (1 1 1) orientation has high laser damage threshold (9.1 GW/cm2) and low optical limiting threshold (24.36 μJ/cm2) and thus the wide dynamic range make it a preferred candidate towards laser safety devices for high repetition rate ultrashort laser pulse excitation.

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Optical, structural and electrical properties of pure and urea doped KDP crystals

Cited by 22 publications

References 10 publications

Structural, spectral, electrical, Z-scan and HOMO LUMO studies on new 2-amino-6-methylpyridinium 2-hydroxybenzoate crystal

Structural, spectral, electrical, Z-scan and HOMO LUMO studies on new 2-amino-6-methylpyridinium 2-hydroxybenzoate crystal

Comparative study of pure polyaniline with various oxidants by a template free method

Anisotropic Nonlinear Optical and Optical Limiting Studies of an Ethylenediamminium Picrate Crystal with Femtosecond Excitation

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