By Bernd Terhalle
Discrete periodic buildings play a major position in physics, and feature unfolded a thrilling new zone of research lately. Questions on the subject of the regulate of sunshine in such constructions nonetheless characterize a massive problem. it truly is this hugely lively box that's adressed within the current thesis. utilizing the version procedure of a photorefractive nonlinearity that enables one to at the same time create and regulate photonic lattices via gentle, the writer obtains a accomplished photo of the keep an eye on of nonlinear and quantum optics phenomena in photonic lattices. He describes and demonstrates experimentally for the 1st time resonant transitions in two-dimensional hexagonal lattices, together with Rabi oscillations and Landau-Zener tunneling, in addition to the direct regulate and exploitation of those transitions. a selected spotlight of this thesis is the learn of soliton-cluster switching and keep an eye on of Zener tunneling.
Read or Download Controlling Light in Optically Induced Photonic Lattices PDF
Best nanostructures books
The monograph areas emphasis on introducing a unique ultrasonic nanowelding expertise of carbon nanotubes (CNTs) to steel electrodes and its software for CNT units. The constitution and digital estate of CNTs, synthesis and purification of CNTs, and the fabrication strategies of CNT-based units and so on.
This thesis offers a common concept of nonequilibrium thermodynamics for info processing. Ever considering Maxwell's demon was once proposed within the 19th century, the connection among thermodynamics and knowledge has attracted a lot awareness since it matters the basis of the second one legislations of thermodynamics.
This unified consultant brings jointly the underlying rules, and predictable fabric responses, that attach metals, polymers, brittle solids and vigorous fabrics as they reply to severe exterior stresses. formerly disparate medical ideas, techniques and terminology are mixed inside a unmarried theoretical framework, throughout diversified fabrics and scales, to supply all of the instruments essential to comprehend, and calculate, the responses of fabrics and constructions to severe static and dynamic loading.
Fourth quantity of a 40volume sequence on nano technology and nanotechnology, edited via the well known scientist Challa S. S. R. Kumar. This instruction manual offers a complete evaluate approximately floor technology instruments for Nanomaterials Characterization. sleek functions and cutting-edge thoughts are lined and make this quantity a vital examining for examine scientists in academia and undefined.
- Thermal Convection
- Thermoelectric Materials: Advances and Applications
- Optical Materials
- High Pressure Phenomena: Varenna on Como Lake, Villa Monastero, 3-13 July 2001 (International School of Physics ''''Enrico Fermi'''', 147)
Extra resources for Controlling Light in Optically Induced Photonic Lattices
3 but, depending on the experimental situation, the interference setup depicted in Fig. 2 may also be used. As an example, Fig. 4 illustrates the experimentally obtained lattice waves for a one-dimensional stripe pattern as well as two-dimensional patterns of square and hexagonal geometry. To demonstrate the stationary, transversally periodic intensity distribution, images are taken at the front face as well as the back face of the crystal for each lattice geometry. 2 Structure Analysis of the Induced Refractive Index Patterns In the last section, it has been shown how to create a nondiffracting periodic lattice wave for optical induction of photonic lattices in photorefractive media.
Unfortunately, the use of these terms is not consistent in literature. However, throughout the rest of this thesis, we will keep the most common choice of notation and refer to the solitons in the semiinfinite gap as discrete solitons while using the term gap solitons for localization in all finite gaps. To give an example of a gap soliton, we consider Bloch waves from the first band at the edge of the Brillouin zone of a one-dimensional periodic structure at kx ¼ Æp=d. The corresponding soliton has a propagation constant lying between the first and the second band .
1 Experimental Realizations A typical setup for the realization of nondiffracting periodic lattice waves for the optical induction of two-dimensional photonic structures is shown schematically in Fig. 2. The beam from a frequency-doubled Nd:YAG laser at a wavelength of 532 nm is sent through a combination of half wave plate and polarizer to control the intensity and ensure ordinary polarization. It is then split into four beams by passing two subsequent Mach–Zehnder-type interferometers. Depending on the desired lattice structure, individual beams may be blocked to interfere either two, three or all four beams inside a 20 mm long photorefractive Sr0:60 Ba0:40 Nb2 O6 (SBN:Ce) crystal which is externally biased with a dc electric field directed along its c-axis.