In this work we set upon showing theoretically that the use of accelerating spatiotemporal Quasi-Phase-Matching (QPM) in media with parametric optical interactions makes it possible to generate a time-reversed replica of the pump pulse envelope in a frequency converted component. We construct the geometrical form for the modulation that will lead to an up-converted envelope-time-reversed replic...

The development of quality protein maize (QPM) was considered a significant leap toward improvement in the nutritional status rural masses developing countries. QPM is attributed to higher concentration essential amino acids, particularly lysine and tryptophan, its kernel endosperm. However, similarity grains normal necessitates standard protocol assess maize. present study aimed at improving a...

Breeding for QPM ear rot resistant cultivars could offer a reliable environmental and economic control of mycotoxins especially for the resource-poor communities that require inexpensive protein diets. This research aims at evaluating a testcross of QPM inbreds with ear rot resistant cultivars to develop resistant topcrosses with high grain protein quality and yield. Seven QPM inbreds (lines) a...

Quasi-phase-matched (QPM) wavelength converters are highly desirable for emerging nonlinear optics applications in photonic integrated circuits, but available waveguide and quasi-phase-matching technologies have so far constrained their realization. In this work, we present a periodically poled lithium niobate (LN) waveguide on a silicon nitride– thin film LN platform. It contains a submicromet...

We present a simple theoretical model for 2 dimensional (2-D) image up-conversion of incoherent light. While image upconversion has been known for more than 40 years, the technology has been hindered by very low conversion quantum efficiency (~10). We show that our implementation compared to previous work can result in a feasible system: Using intracavity upconversion and Quasi Phase Matching (...

1. The optical transparency of unstained live cell specimens limits the extent to which information can be recovered from bright-field microscopic images because these specimens generally lack visible amplitude-modulating components. However, visualization of the phase modulation that occurs when light traverses these specimens can provide additional information. 2. Optical phase microscopy and...

A mid-infrared difference frequency generator (DFG) based on a periodically poled thin-film lithium niobate rib waveguide sapphire substrate is theoretically studied. mode analysis carried out at the region, and focuses effects of geometry effective refractive indices few lower-order modes. complete theory suitable for modeling DFG structure described. Its validity confirmed by comparing theore...

Orientation-patterned gallium phosphide (OP-GaP) and orientation-patterned antimonide (OP-GaSb) have demonstrated excellent potential for broadband second harmonic generation (SHG), with a wide range of fundamental wavelengths temperature tunability, making them promising candidates use in various applications. In this paper, an analytical demonstration forward backward SHG is presented, delive...

Introducción. Actualmente el maíz es grano más cultivado en mundo y factible mejorar la nutrición de sus consumidores mediante desarrollo del con proteína calidad (QPM, inglés), cuya base expresión gen opaco2, cual incrementa los contenidos lisina triptófano grano. Objetivo. Analizar químicamente líneas e híbridos simples experimentales QPM conocer las relaciones entre genotipo variables evalua...