کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
734229 893405 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Laser induced damage studies in mercury cadmium telluride
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Laser induced damage studies in mercury cadmium telluride
چکیده انگلیسی

We have investigated laser induced damage at 1.06μm laser wavelength in diamond paste polished (mirror finish) and carborundum polished Hg0.8Cd0.2TeHg0.8Cd0.2Te (MCT) samples with increasing fluence as well as number of pulses. Evolution of damage morphology in two types of samples is quite different. In case of diamond paste polished samples, evolution of damage morphological features is consistent with Hg evaporation with transport of Cd/Te globules towards the periphery of the molten region. Cd/Te globules get accumulated with successive laser pulses at the periphery indicating an accumulation effect. Real time reflectivity (RTR) measurement has been done to understand melt pool dynamics. RTR measurements along with the thermal profile of the melt pool are in good agreement with thermal melting model of laser irradiated MCT samples. In case of carborundum polished samples, laser damage threshold is significantly reduced. Damage morphological features are significantly influenced by surface microstructural condition. From comparison of the morphological features in the two cases, it can be inferred that laser processing of MCT for device applications depends significantly on surface preparation conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics & Laser Technology - Volume 39, Issue 7, October 2007, Pages 1319–1327
نویسندگان
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