Search results for " Second-harmonic generation"

showing 4 items of 4 documents

All-Optical frequency Shifter in a Periodically Poled Lithium Tantalate Waveguide

2011

A frequency shifting device is fabricated and tested in a congruent Lithium Tantalate waveguide. Periodic poling for quasi-phase-matching and channels for operation in the near-infrared C-band were obtained, demonstrating a two-stage parametric conversion.

All-optical wavelength conversion second-harmonic generation difference-frequency generation ferroelectric crystals periodic poling Lithium Tantalate Lithium Niobate.Settore ING-INF/02 - Campi ElettromagneticiSettore ING-INF/01 - Elettronica
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GENERAZIONE DI SECONDA ARMONICA RETRO-PROPAGANTE IN NIOBATO DI LITIO CON POLING PERIODICO

2010

We report on backward second-harmonic-generation in bulk periodically poled congruent lithium niobate with a 3.2 micron period. A tunable continuous-wave Ti:Sapphire laser allowed us exciting two resonant quasi-phase-matched orders. Resonances were also resolved by temperature tuning.

Nonlinear optics Backward second-harmonic generation Lithium niobate
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Reconfigurable nonlinear response of dielectric and semiconductor metasurfaces

2021

Abstract Optically resonant dielectric and semiconductor metasurfaces are an emerging and promising area of nanophotonics and light–matter interaction at the nanoscale. Recently, active tuning of the linear response and nonlinear effects of these components has received an increasing amount of interest. However, so far these research directions have remained separated with only few sporadic works that study their combination beginning to appear in the literature. The evolution of nonlinear metasurfaces based on dielectric and semiconductor materials toward reconfigurable and dynamic components could potentially answer the demand of integrated on-chip components that realize essential functi…

dielectric metasurfaces nanophotonics nonlinear optics second-harmonic generation third-harmonic generationMaterials sciencebusiness.industrydielectric metasurfaces; nanophotonics; nonlinear optics; second-harmonic generation; third-harmonic generationPhysicsQC1-999nonlinear opticsNanophotonicsSecond-harmonic generationNonlinear opticsPhysics::OpticsSettore ING-INF/02 - Campi ElettromagneticiDielectricAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materialsthird-harmonic generationNonlinear systemSemiconductorOptoelectronicsnanophotonicsdielectric metasurfacesElectrical and Electronic EngineeringbusinessBiotechnologysecond-harmonic generationNanophotonics
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Biomechanical analysis of Ascending Thoracic Aortic Aneurysm (ATAA)

2021

According to the reports of the World Health Organisation (WHO), cardiovascular diseases are the number one cause of death worldwide. Specifically, arterial disease and degeneration are the major reasons for cardiovascular death and disability. Because these diseases are dependent on the changes of the mechanical properties of the arterial wall, it is very important to know as much as possible about the structural composition of arteries. The human aorta is the biggest artery in the body and consists of three main parts, ascending aorta, aortic arch and descending aorta. The walls of the arteries consist of three layers, the intima, media and adventitia, where each of the layers has differe…

experimental identification multiphoton imaging Second-harmonic generation fine element method.continuum mechanichyperelastic modelSettore ING-IND/34 - Bioingegneria Industrialehyperelastic material
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