Search Results - "Lambropoulos, John C."

Mechanisms of picosecond laser-induced damage in common multilayer dielectric coatings by Kozlov, Alexei A., Lambropoulos, John C., Oliver, James B., Hoffman, Brittany N., Demos, Stavros G.

“…The physical mechanisms and ensuing material modification associated with laser-induced damage in multilayer dielectric high reflectors is investigated for…”
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A magnetorheological polishing-based approach for studying precision microground surfaces of tungsten carbides by Shafrir, Shai N., Lambropoulos, John. C., Jacobs, Stephen D.

“…Surface features of tungsten carbide composites processed by bound abrasive deterministic microgrinding and magnetorheological finishing (MRF) were studied for…”
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Microhardness and Indentation Fracture of Potassium Dihydrogen Phosphate (KDP) by Fang, Tong, Lambropoulos, John C.

“…Potassium dihydrogen phosphate (KDP) is an important electrooptic tetragonal crystal, often used in third harmonic generation in laser systems. We have used…”
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Verification of cascade optical coherence tomography for freeform optics form metrology by Xu, Di, Wen, Zhenkun, Coleto, Andres Garcia, Pomerantz, Michael, Lambropoulos, John C, Rolland, Jannick P

“…Freeform optical components enable dramatic advances for optical systems in both performance and packaging. Surface form metrology of manufactured freeform…”
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Femtosecond laser polishing of germanium [Invited] by Taylor, Lauren L., Xu, Jing, Pomerantz, Michael, Smith, Thomas R., Lambropoulos, John C., Qiao, Jie

“…Freeform optics can reduce the cost, weight, and size of advanced imaging systems, but it is challenging to manufacture the complex rotationally asymmetric…”
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Magnetic field effects on shear and normal stresses in magnetorheological finishing by Lambropoulos, John C, Miao, Chunlin, Jacobs, Stephen D

“…We use a recent experimental technique to measure in situ shear and normal stresses during magnetorheological finishing (MRF) of a borosilicate glass over a…”
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Synthesis and corrosion study of zirconia-coated carbonyl iron particles by Shen, Rui, Shafrir, Shai N., Miao, Chunlin, Wang, Mimi, Lambropoulos, John C., Jacobs, Stephen D., Yang, Hong

“…Coatings of faceted zirconia nanocrystals are synthesized on carbonyl iron (CI) magnetic particles using a sol–gel approach. The zirconia-coated CI particles…”
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Surface effects on Young's modulus and hardness of fused silica by nanoindentation study by LIANQING ZHENG, SCHMID, Ansgar W, LAMBROPOULOS, John C

“…The surface Young’s modulus (E) and hardness (H) of fused silica samples have been studied by nanoindentation. Two factors strongly affect the results of E and…”
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Thermal shock and post-quench strength of lapped borosilicate optical glass by Liu, Han, Wu, Yuansun, Lambropoulos, John C.

“…We have measured and modeled the thermal shock fracture and strength degradation of the commercially available BK-7 borosilicate crown optical glass as a…”
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Freeform optics for imaging by Rolland, Jannick P., Davies, Matthew A., Suleski, Thomas J., Evans, Chris, Bauer, Aaron, Lambropoulos, John C., Falaggis, Konstantinos

“…In the last 10 years, freeform optics has enabled compact and high-performance imaging systems. This article begins with a brief history of freeform optics,…”
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UV-laser-induced densification of fused silica: a molecular dynamics study by Zheng, Lianqing, Lambropoulos, John C., Schmid, Ansgar W.

“…Classical molecular dynamics simulations have been performed to study the UV-laser-induced densification in fused silica. Relationships between induced…”
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Deterministic Microgrinding, Lapping, and Polishing of Glass-Ceramics by Lambropoulos, John C., Jacobs, Stephen D., Gillman, Birgit E., Stevens, Harrie J.

“…We report a series of microgrinding and polishing experiments on glass–ceramics. Microgrinding includes deterministic microgrinding (two‐body abrasion at fixed…”
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Molecular dynamics study of UV-laser-induced densification of fused silica. II. Effects of laser pulse duration, pressure, and temperature, and comparison with pressure-induced densification by Zheng, Lianqing, Lambropoulos, John C., Schmid, Ansgar W.

“…Numerical simulations on UV-laser-induced densification of fused silica have been performed using classical molecular dynamics. The effect of laser irradiation…”
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Mechanisms of picosecond laser-induced damage in common multilayer dielectric coatings by Kozlov, Alexei A., Lambropoulos, John C., Oliver, James B., Hoffman, Brittany N., Demos, Stavros G.

“…Abstract The physical mechanisms and ensuing material modification associated with laser-induced damage in multilayer dielectric high reflectors is…”
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Direct-write laser-assisted patterning of form birefringence in wave plates fabricated by glancing-angle deposition by Mireles, Marcela, Hoffman, Brittany N., MacNally, Sara, Smith, Christopher C., Lakshmanan, Sanjay N., Lambropoulos, John C., Rigatti, Amy L., Demos, Stavros G.

“…The development of optics that provide spatial control of birefringence could enable better control of laser beam polarization, but available solutions are…”
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Surface–texture evolution of different chemical-vapor-deposited zinc sulfide flats polished with various magnetorheological fluids by Salzman, Sivan, Romanofsky, Henry J., Jacobs, Stephen D., Lambropoulos, John C.

“…•We show crystallographic variations among CVD ZnS manufactured by different vendors.•This raises inconsistent performances during magnetorheological…”
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Toughening and crack tip shielding in brittle materials by residually stressed thin films by Lambropoulos, John C.

“…The apparent fracture toughness of brittle components can be greatly enhanced via surface‐deposited thin films which are under residual, possibly nonuniform…”
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Thermoelastic analysis of dislocation generation during edge-defined film-fed growth of polygonal shells by Wu, Chien-Hsing, Lambropoulos, John C.

“…A thermoelastic model is used to predict qualitatively the dislocation generation for the edge-defined film-fed growth (EFG) of polygonal shells. The…”
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Mechanics of shaped crystal growth from the melt by Lambropoulos, John C., Wu, Chien-Hsing

“…We present the numerical formulation of the thermal stress driven steady-state dislocation generation during the growth of shaped crystals from the melt, with…”
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Lifetime prediction of laser-precracked fused silica subjected to subsequent cyclic laser pulses by Dahmani, Faiz, Schmid, Ansgar W., Lambropoulos, John C., Burns, Stephen J., Papernov, Semyon

“…Measurements of fatigue failure strength of laser-cracked fused silica in air at room temperature for different numbers of laser shots and laser fluences are…”
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