Numerical design of all-dielectric nanophotonic optical tweezers for lossless manipulation of small nanoparticles

• Grant number: 17/25587-5
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: April 01, 2018
• End date: February 28, 2022
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Osvaldo Novais de Oliveira Junior
• Grantee: Jhon James Hernández Sarria
• Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 13/14262-7 - Nanostructured films from biologically-relevant materials, AP.TEM

Abstract

The electromagnetic response of biological samples at microwave frequencies may be exploited in various applications, including for detection of chiral molecules. In this research project, we aim at designing microwave near-field biosensors for chiral molecules through the analysis of microwave field distributions in the vicinity of thin-film ferrite disks using the RF module of the software COMSOL Multiphysics. The electromagnetic fields scattered from a subwavelength ferrite-disk due to precessing electron spins are relevant because the ferrite particles generate microwave superchiral fields (in which field lines turn around a principal axis) with strong localization of electromagnetic (EM) energy. Such fields are useful for the characterization of chemical and biological objects with chiral properties, as in biomedical diagnostics. Herein we shall investigate the topological properties of microwave fields generated by configurations of small ferrite disks to propose an effective microwave biosensor that can be developed experimentally. (AU)

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)

HERNANDEZ-SARRIA, JHON JAMES; OLIVEIRA JR, OSVALDO N.; MEJIA-SALAZAR, JORGE RICARDO. Numerical Simulations of Double-Well Optical Potentials in All- Dielectric Nanostructures for Manipulation of Small Nanoparticles in Aqueous Media. ACS APPLIED NANO MATERIALS, v. N/A, p. 8-pg., 2023-01-18. (17/25587-5, 18/22214-6, 22/14229-9)

HERNANDEZ-SARRIA, J. J.. Generic Hubbard Hamiltonian for 1D Large-Spin Ultracold Fermionic Chains. Journal of Superconductivity and Novel Magnetism, v. 34, n. 12, NOV 2021. (17/25587-5)

HERNANDEZ-SARRIA, J. J.; OLIVEIRA JR, OSVALDO N.; MEJIA-SALAZAR, J. R.. Toward Lossless Infrared Optical Trapping of Small Nanoparticles Using Nonradiative Anapole Modes. Physical Review Letters, v. 127, n. 18, OCT 26 2021. (18/22214-6, 17/25587-5)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SARRIA, Jhon James Hernández. Numerical design of all-dielectric nanophotonic optical tweezers for lossless manipulation of small nanoparticles. 2022. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT) São Carlos.