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Coherent Control of nonlinear processes via genetic algorithm: study of spectral phase modulation through principal component analysis

Grant number: 12/00702-2
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2012
Effective date (End): March 01, 2017
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal Investigator:Cleber Renato Mendonça
Grantee:Renato Juliano Martins
Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:11/12399-0 - Femtosecond pulses applied to nonlinear optics: spectroscopy, pulse shaping and microfabrication, AP.TEM
Associated scholarship(s):14/07270-6 - Coherent control of molecular dynamics via adaptive pulse shaping, BE.EP.DR


Pulses with duration of Femtosecond presents a broad band spectral feature, which allows the formatting of their spectral components. Methods of pulses formatting are being used to control the interaction of light with matter in non-linear processes. Indeed, understanding how the characteristics of the pulse phase modulation affect the coherent control must allow a breakthrough in this area. However, this understanding becomes quite complex when the genetic-like algorithms are used to optimize a given process. Thus, in this project we intend to use the method of principal component analysis (PCA) to assist in the interpretation of results obtained using the genetic algorithm. We intend, for example, develop a methodology that uses PCA to identify only the most relevant aspects of phase masks, facilitating the understanding of the problem. With this methodology, we propose to study the coherent control of the emission excited via multiphoton absorption in zinc oxide (ZnO), an interesting material for the manufacture of optical and photonic devices. We also will investigate further optimization of the process of absorption of two photons in perylene derivatives, materials that have high cross-sections of nonlinear absorption. For these materials, we intend, through the analysis of the pulse obtained from the GA, with the aid of PCA, pointing out aspects of the process connected to coherent control characteristics of the compounds.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ALMEIDA, G. F. B.; MARTINS, R. J.; OTUKA, A. J. G.; SIQUEIRA, J. P.; MENDONCA, C. R.. Laser induced periodic surface structuring on Si by temporal shaped femtosecond pulses. Optics Express, v. 23, n. 21, p. 27597-27605, . (11/23587-1, 12/00702-2, 11/12399-0, 12/03513-6)
MARTINS, R. J.; SIQUEIRA, J. P.; CLAVERO, I. MANGLANO; MARGENFELD, C.; FUENDLING, S.; VOGT, A.; WAAG, A.; VOSS, T.; MENDONCA, C. R.. Carrier dynamics and optical nonlinearities in a GaN epitaxial thin film under three-photon absorption. Journal of Applied Physics, v. 123, n. 24, . (11/12399-0, 12/00702-2)
MARTINS, R. J.; SIQUEIRA, J. P.; MENDONCA, C. R.. Effect of SLM pixelation on two-photon fluorescence by applying an off-centered quadratic spectral phase mask. Laser Physics, v. 26, n. 12, . (11/12399-0, 12/00702-2)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
MARTINS, Renato Juliano. Study of nonlinear optical properties of semiconductors via pulse shaping. 2017. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT) São Carlos.

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