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Bulk crystals of ammonium acid phthalate single crystals for optical limiting applications grown by Sankaranarayanan- Ramasamy method

Arunkumar Alagesan ,  Ramasamy Perumalsamy 

Centre for Crystal Growth,SSN College of Engineering,Kalavakkam,Chennai, Chennai 603110, India

Abstract
        Transparent ammonium acid phthalate (AAP)  crystal of  length 140 mm long and 20 mm diameter has been grown from aqueous solution in <001> using Sankaranarayanan - Ramasamy method. The unit cell parameters were confirmed by single crystal X-ray diffraction analysis and it belongs to orthorhombic system. The crystalline perfection of grown crystals was analyzed by High-resolution X-ray diffraction. The UV-vis-NIR spectrum showed that the grown crystal is transparent in the entire visible region. Fluorescence studies were carried out in range of   200 – 700 nm.  Thermogravimetric and differential thermal analysis was carried out to determine the thermal property of the grown crystal. The mechanical property of the grown crystal was studied by Vickers Microhardness measurement.  Nonlinear optical absorption of the sample has been studied at 532 nm using single 7 ns laser pulses, employing the open-aperture Z-scan technique. It is found that the AAP molecule is a potential candidate for optical limiting applications. The laser damage threshold was measured using Q-switched Nd: YAG  laser (1064 nm).

poland.jpgPhotograph of SR grown ammonium acid phthalate crystal

 

Auxiliary resources (full texts, presentations, posters, etc.)
  1. PRESENTATION: Bulk crystals of ammonium acid phthalate single crystals for optical limiting applications grown by Sankaranarayanan- Ramasamy method, Microsoft Office Document, 0.2MB
 

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Presentation: Oral at 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17, General Session 2, by Ramasamy Perumalsamy
See On-line Journal of 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17

Submitted: 2013-03-25 19:05
Revised:   2013-07-16 14:05