Synthesis, growth and characterization of γ-glycine – A promising material for optical applications

Sivakumar, N.; Jayaramakrishnan, V.; Baskar, K.; Anbalagan, G.

doi:10.1016/j.optmat.2014.09.007

Cited by 22 publications

(5 citation statements)

References 36 publications

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“…The refractive indices of air and glycine are n a = 1 and n g = 1.69. [ 24 ] The inclined facet causes a change of propagation direction in the incident beam, Figure 1c.…”

Section: Figurementioning

confidence: 99%

Quantitative Polarization‐Resolved Second‐Harmonic‐Generation Microscopy of Glycine Microneedles

et al. 2020

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amino acids, peptides, and proteins offers a noncontact, label-free and nondestructive method of obtaining a better understanding of disease processes both in vitro and in vivo. SHG has further applications in nanoscale characterization, [5] measurement of field-induced carrier motion in photonic devices, [6] and in the development of micro/nanoscale lasers. [7] Qualitative comparison of SHG conversion efficiency suffers from not having a clear benchmark of quantitative values of tensor elements. First principles modeling to obtain quantitative values of the susceptibility tensor such as time-dependent density functional theory is computationally demanding for typical ≥100 atom biomolecule cells and also needs to be benchmarked against experimental values. [8] The β and γ phases of glycine have been recently reported to possess high piezoelectric strain constants. [9] As both the strain and susceptibility tensors of a piezoelectric crystal have an equivalent third rank tensor form, the quantitative susceptibility tensor of glycine crystals provides a useful benchmark for SHG imaging of hierarchical structures in biology that could speed development of quantitative tissue imaging and diseases diagnosis. [10] Glycine is the simplest and only achiral amino acid with a single hydrogen as its side chain, NH 3 + CH 2 COO −. It crystallizes in three distinct phases under ambient conditions α, β, and γ. The carboxyl (COOH) and amino (NH 2) terminal groups become charged to form the zwitterion. [11] The α-phase crystallizes in space group P2 1 /c, comprising of centrosymmetric double layers of zwitterions linked via hydrogen bonds. [12] For this polymorph the presence of a center of symmetry precludes SHG. The β phase shows space group P2 1 and is composed of double layers of zwitterions but the molecular packing is noncentrosymmetric. The γ phase is also SHG active, crystallizing in the noncentrosymmetric trigonal space group P3 1, which forms a 3D molecular network with the zwitterions arranged in helices around the 3 1 screw axis. [13] The difference in properties between phases is due to the differing zwitterion stacking and internal bond angles. [14] Both of the noncentrosymmetric phases of glycine have shown potential as a biocompatible NLO material (Table S1, Supporting Information). A 21 µm thick layer of β glycine nanofibers has been shown to have a larger effective χ (2) relative to 600 µm particles of β glycine due to their subcoherence

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“…The refractive indices of air and glycine are n a = 1 and n g = 1.69. [ 24 ] The inclined facet causes a change of propagation direction in the incident beam, Figure 1c.…”

Section: Figurementioning

confidence: 99%

Quantitative Polarization‐Resolved Second‐Harmonic‐Generation Microscopy of Glycine Microneedles

et al. 2020

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“…The refractive index and bandgap of the material were calculated from the transmittance spectra. [28][29][30] The measured transmittance T was used to calculate the absorption coefficient α using the formula:…”

Section: Optical Transmittancementioning

confidence: 99%

Bulk growth, crystalline perfection and optical characteristics of inversely soluble lithium sulfate monohydrate single crystals grown by the conventional solvent evaporation and modified Sankaranarayanan–Ramasamy method

Silambarasan¹,

Rao

et al. 2016

CrystEngComm

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Good quality bulk size single crystals of inverse soluble lithium sulphate monohydrate (LSMH) have been grown by the modified Sankaranarayanan-Ramasamy (SR) method. A growth rate as high as 3 mm per day has been obtained for LSMH growth without substantially degrading the optical quality. The rocking curve recorded using the high resolution X-ray diffraction (HRXRD) technique reveals that the crystals grown by this method have a high degree of crystalline perfection. The optical quality of the crystals was studied using an UV-vis-NIR spectrum and the optical constants of the LSMH crystals were calculated. The laser damage threshold value of the grown crystals has been determined using a nanosecond Nd:YAG laser operating at 532 nm. Photoconductivity studies of the grown LSMH crystals reveal a positive photoconductivity behaviour of the grown crystals. The photoluminescence spectrum of the LSMH crystals shows a prominent emission peak at 373 nm. The third order non-linear optical properties of the LSMH crystals were investigated in detail by the Z-scan technique using a He-Ne laser operating at 632.8 nm. The non-linear refractive index (n 2 ), non-linear absorption coefficient (β) and third order non-linear susceptibility (χ (3) ) of the LSMH crystals were calculated.

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“…The theoretical Z‐scan technique is a versatile one that is normally used to study the dielectric nature of NLO medium and also used to analyze the dielectric susceptibility followed by NLO refractive. [ 29 ] The scan calculation was made on the molecule and proportionate parameters were measured by imaginary and real parts of dielectric susceptibility (DS). The DS was estimated from the production of molecular polarizability (homonuclear and heteronuclear bonds) and molecular hyperpolarizability per unit mole of a substance.…”

Section: Resultsmentioning

confidence: 99%

Optoelectronic Evaluation, Chemical Potential Identification, Chemiparametric Oscillation Mapping, and Dielectric Efficiency Investigation of Organic NLO Crystal: 2‐Aminofluorene Using Computational Calculations

Thirumurugan¹,

Ramalingam²,

Periandy

et al. 2021

Crystal Research and Technology

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In this work, the semi‐organic, 2‐aminofluorene single‐crystal is grown by slow evaporation method. The crystal is optimized and determination of optical axis and the crystal sample is characterized. The volume of the crystal is 568.22 Å3and density −1.311 mg cm−3. The XRD parameters estimate crystal lattice as orthorhombic. The birefringence effect is measured with inter‐atomic attractive dispersion forces. The rearrangement of molecular frame of fluorine on par with amino substitution is estimated. The electro‐optic effect is established by parametric oscillations of accumulation of chemical potential to enable the mechanism of nonlinear optical (NLO) effect. The dielectric loss with respect to the temperature/electrical frequency and the active optical property is measured. The amino group causes optical scattering of nodal regions for radiation absorption process to fascinate optical endurance. The chemical energy processing to acquire the chemical potential to operate light frequency amplification is thoroughly studied from the observation of chemical shift over the molecular frame. The oscillated parametric energy on nonbonding molecular orbital (NBMO) is initiated by the NH2group on the ring carbon–carbon (CC) and it is exchanged among nodal zones of core and comprised of the above segments of the ring.

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Synthesis, growth and characterization of γ-glycine – A promising material for optical applications

Cited by 22 publications

References 36 publications

Quantitative Polarization‐Resolved Second‐Harmonic‐Generation Microscopy of Glycine Microneedles

Quantitative Polarization‐Resolved Second‐Harmonic‐Generation Microscopy of Glycine Microneedles

Bulk growth, crystalline perfection and optical characteristics of inversely soluble lithium sulfate monohydrate single crystals grown by the conventional solvent evaporation and modified Sankaranarayanan–Ramasamy method

Optoelectronic Evaluation, Chemical Potential Identification, Chemiparametric Oscillation Mapping, and Dielectric Efficiency Investigation of Organic NLO Crystal: 2‐Aminofluorene Using Computational Calculations

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