SCIENCE SPIN-OFFS

[dockzef]

Yesterday the slipstream coming off the time machine caught my attention. The temperature was perfect to watch the wind pull the steam in slow motion off the surface with the bubbles exploding in mid air, allowing for the negative ion absorption. When you lift your hand into the flow it allows one to form large upwar vortex's that often twist against the wind. The reason I mention this is that a paper I read mentioned that the magnetic bonding that happens as molecules are printed out can change the properties as they are coming out of the the laser. This made me wonder if you are Roll to Roll printing if your had to have different heads on the printers for each layer being printed? Strange but totally thankful for the revelation as it stands for proof positive via the slipstream! Peace



Diabatic Mechanisms of Higher-Order Harmonic Generation in Solid-State Materials under High-Intensity Electric Fields

T. Tamaya, A. Ishikawa, T. Ogawa, K. Tanaka
(Submitted on 11 Jan 2017)

We theoretically investigate mechanisms of higher-order harmonic generation in solid-state materials under a high-intensity ac electric field. A new theoretical framework presented in this Letter holds the legitimacy of Bloch theorem even under the influence of the high-intensity electric field and provides an exact treatment of the diabatic processes of Bloch electrons. Utilizing this framework, we first discovered that the diabatic processes, namely, ac Zener tunneling and semimetallization of semiconductors, are key factors for nonperturbative mechanisms of HHG. These mechanisms are classified by the field intensity and could be understood by an extended simple man model based on an analogy between tunnel ionization in gaseous media and Zener tunneling in semiconductors. These conclusions would stimulate the universal understanding of HHG mechanisms in both atomic and solid cases.

https://arxiv.org/abs/1701.02869