Frequency Distribution of Hexamethylenetetramine Crystals

Frequency-controllable electric field distribution in colloidal crystals

The study of electric field distributions in graded systems is important due to various applications. We establish an analytical method based on the Maxwell equations, to investigate electric field distributions in graded multilayered colloidal crystals. This analytical method agrees very well with an existing numerical method. It convincingly explains and confirms the fact that the peak of ele...

Biodegradation of Hexamethylenetetramine in Anaerobic Baffled Reactor

Due to its structure, hexamethylenetetramine (HMT) is a slowly biodegradable substance, hydrolysing in acid environment to ammonium and formaldehyde. Formaldehyde is toxic under normal conditions for biological treatment processes. Following an adaptation, a formaldehyde concentration of 1000 mg·l may become biodegradable both in aerobic and anaerobic conditions. Acidic conditions for hydrolysi...

Dual frequency liquid crystals: a review

Soliton Crystals in Kerr Microresonator Frequency Combs

We explore ordered soliton ensembles in Kerr microresonators. These soliton crystals are stabilized through collective soliton interactions mediated by defects in resonator mode structure, and require only adiabatic tuning of the pump for generation. OCIS codes: (190.5530) Pulse propagation and temporal solitons; (140.3945) Microcavities Dissipative Kerr-cavity solitons are a promising candidat...

Yb:YAG Laser Crystals with Controlled Doping Distribution

soutenue le 21 Mars 2013 devant le jury composé de : Acknowledgements The success of a research project like this is never a work of a single person. Many individuals contributed in different ways to the preparation and completion of this work and I would like to extend my appreciation to all of them. First and foremost, my utmost gratitude goes to head of Lucia project and my direct supervisor...