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Introduction to THz Wave Photonics
Introduction to THz Wave Photonics

systematics and crystal genesis of carbonate minerals
systematics and crystal genesis of carbonate minerals

Lenses and Waves: Christiaan Huygens and the Mathematical
Lenses and Waves: Christiaan Huygens and the Mathematical

Soliton Generation and Control in Engineered  Materials    Olga Borovkova 
Soliton Generation and Control in Engineered  Materials    Olga Borovkova 

... lattices  with  transversally  alternating  domains  with  cubic  and  saturable  nonlinearities.  We  consider  multicomponent  solitons  in  engineered  materials,  where  one  field  component  feels  the  modulation  of  the  refractive  index  or  nonlinearity  while  the  other  component  pro ...
High Contrast Gratings for Integrated Optoelectronics
High Contrast Gratings for Integrated Optoelectronics

... resonance conditions of the individual supermodes, shown by the blue curves, superimposed on the reflectivity contour in (a). A horizontal line tg=0.89Λ is plotted for the chosen thickness, which cuts across various resonance curves of different modes. The crossing point regions are labeled A–D. The ...
My PhD - Photonics Research Group
My PhD - Photonics Research Group

... ik dan zeker iemand zou vergeten. Maar in het bijzonder wil ik Hendrik, Steven en Liesbet bedanken voor het operationeel houden van de meetruimte en de clean room. I would also like to thank the PICCO project partners from Glasgow, St.-Andrews and Copenhagen. Special thanks to Harold for fabricating ...
Abstracts for OPTO 2014
Abstracts for OPTO 2014

... were demonstrated to improve the performance of nitride-based LEDs and laser diodes. However, the measured performance improvements often deviate from the theoretical expectations, mainly due to MQB deformations typically found in real devices. Using advanced numerical simulation, we analyze recentl ...
Fused Silica Transmission Gratings
Fused Silica Transmission Gratings

Chapter 2: Radar Cross Section (RCS)
Chapter 2: Radar Cross Section (RCS)

Organic Broadband Terahertz Sources and Sensors
Organic Broadband Terahertz Sources and Sensors

Waveguide lasers in ytterbium doped tantalum pentoxide for
Waveguide lasers in ytterbium doped tantalum pentoxide for

generation and propagation of optical vortices
generation and propagation of optical vortices

... Vortices are fascinating topological features which are ubiquitous throughout the Universe. They play an important role in a great number of physical processes ranging from microscopic structure of superfluid helium1–4 to global weather patterns5 and possibly to formation of matter in the Big Bang.6 ...
MODELLING OF PHOTONIC COMPONENTS BASED ON ÷(3) NONLINEAR PHOTONIC CRYSTALS Ivan Maksymov
MODELLING OF PHOTONIC COMPONENTS BASED ON ÷(3) NONLINEAR PHOTONIC CRYSTALS Ivan Maksymov

... photonic crystals and the super-cell technique is applied to simulate various defects introduced, for instance, by removing a row of scatterers. In addition, the plane wave expansion method is used as an auxiliary tool to calculate linear dispersion characteristics with the purpose of validating the ...
Full-Text PDF
Full-Text PDF

Wave vector
Wave vector

... many orders, that is, shadow gratings, a corresponding grat ing wave vector is [Formula 1], and the grating pro?le of all the shadow gratings changes with the sampling structure ...
Get PDF - OSA Publishing
Get PDF - OSA Publishing

... (i.e., ∼1°∕nm), almost tenfold larger than that observed in SPR measurements of organic monolayers. We find that this significantly large SPR shift easily enables the thickness of a large area sample (i.e., ∼mm2 ) to be determined with subnanometer-scale resolution. We show that the SPR method can i ...
Investigating Naturally Occurring 3
Investigating Naturally Occurring 3

reflectance measurement and modelling of high reflectivity
reflectance measurement and modelling of high reflectivity

... Basically this research project consists of the operation of Fourier Transform Infrared (FT-IR) spectroscopy to measure the reflectance of the samples and simulation of DBR stacks using a technical computing language, Matlab for the investigation purposes as well as for comparison with the measured ...
A mis padres y mi hermana A Iván A la memoria de Alberto Serrano
A mis padres y mi hermana A Iván A la memoria de Alberto Serrano

... in a significant percentage of the population, who develop refractive errors (30% of the population in Europe and up to 85% in some Asian countries suffers from myopia) (Saw 2003; Kempen et al. 2004; Jorge et al. 2007). Despite its high prevalence, the etiology of myopia is not fully understood, alt ...
1 - Foundation for Research and Technology
1 - Foundation for Research and Technology

... The field of electromagnetic metamaterials is driven by fascinating and far-reaching theoretical visions such as, e.g., perfect lenses, invisibility cloaking, and enhanced nonlinearities. This emerging field has seen spectacular experimental progress in recent years. Yet, two major challenge remains ...
RESONATOR OPTICS
RESONATOR OPTICS

Untitled
Untitled

Hasan, Ahmed and Mohiuddin
Hasan, Ahmed and Mohiuddin

... large Kerr constants. A glass cell filled with one of these liquids is called a Kerr cell. These are frequently used to modulate light, since the Kerr effect responds very quickly to changes in electric field. Light can be modulated with these devices at frequencies as high as 10 GHZ Because the Ker ...
META`16 Malaga - Spain - META`17, the 8th International
META`16 Malaga - Spain - META`17, the 8th International

... surface science, disordered systems and photonics. His most famous work has introduced a new class of materials, metamaterials, whose electromagnetic properties depend on their internal structure rather than their chemical constitution. He discovered that a perfect lens manufactured from negatively ...
Multistep Parametric Processes in Nonlinear Optics
Multistep Parametric Processes in Nonlinear Optics

1 2 3 4 5 ... 96 >

Birefringence



Birefringence is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. These optically anisotropic materials are said to be birefringent (or birefractive). The birefringence is often quantified as the maximum difference between refractive indices exhibited by the material. Crystals with asymmetric crystal structures are often birefringent, as are plastics under mechanical stress.Birefringence is responsible for the phenomenon of double refraction whereby a ray of light, when incident upon a birefringent material, is split by polarization into two rays taking slightly different paths. This effect was first described by the Danish scientist Rasmus Bartholin in 1669, who observed it in calcite, a crystal having one of the strongest birefringences. However it was not until the 19th century that Augustin-Jean Fresnel described the phenomenon in terms of polarization, understanding light as a wave with field components in transverse polarizations (perpendicular to the direction of the wave vector).
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