Technical Program

PL-G-WED

Plenary 3

9:30 to 12:40 / Room 1 (Live)

Lino, Anderson

75

PL-G-WED-01

Ildeu de Castro Moreira (to be confirmed)

9:30 to 10:15  ·  Room 1 (Live)

76

PL-G-WED-02

Shining Light on Nonlinear Optics in 2D Layered Transition Metal Dichalcogenides

Walter Margulis

10:15 to 11:00  ·  Room 1 (Live)

2D Layered Transition Metal Dichalcogenides (LTMDs) are bi-dimensional nanostructures consisting of atomically thin monolayers of the type MX2, with M a transition metal atom and X a chalcogen atom. Besides the well-known and studied semiconducting MoS2 and WS2, semi-metallic ZrTe2 and metallic NbS2 are examples of 2D LTMDs. In this talk, I shall review the relevant properties of the four above mentioned materials, some of the fabrication methods, and will describe nonlinear optical studies covering a range of excitation regimes. Using CW or CW/ML (>1MHz repetition rate) excitation sources with linearly or circularly polarized light, we show that the intensity dependent refractive changes are thermal in origin, ~10-6cm2/W, and lead to ring formation due...

BREAK

11:00 to 11:10

Break

77

PL-G-WED-03

Anderson Stevens Leônidas Gomes

11:10 to 11:55  ·  Room 1 (Live)

78

PL-G-WED-04

Jose Luis Fabris

11:55 to 12:40  ·  Room 1 (Live)

Lunch Break

Technical Session 1

14:30 to 17:10 / Room 1 (Live)

Sensors, Image and Illumination 1

Daniel

14:30 to 15:40 / Room 1 (Live)

79

OS-S-WED-01-01

Metalenses with wide field of view and diffraction limited resolution: concepts and trade-offs

Invited Paper

Emiliano Rezende Martins (USP)

14:30 to 15:00  ·  Room 1 (Live)

Metasurfaces are nanostructured planar surfaces designed to control the phase and amplitude of an optical beam. They can be designed as a metalens, which finds widespread applications. Metalenses can be readily designed to obtain diffraction limited resolution, or as fisheye-type lenses with arbitrarily wide field of view. One of their main challenges, however, is to reduce all the aberrations in a single design. This paper compares the main physical constraints behind two of the most important monochromatic aberrations: spherical aberrations and off-axis aberrations. In the talk, novel routes to controlling the aberration will be presented.

80

OS-S-WED-01-02

Comparative spectroscopic studies between conventional and organic soybean oils

Carla Lopes (UNIFESP); Heron da Silva (UNIFESP); Lilia Courrol (UNIFESP/ICAQF)

15:00 to 15:20  ·  Room 1 (Live)

A healthy lifestyle based on an organic diet appears to be a growing trend among young adults. Organic soybean oils are an alternative to conventional oils, but they can be the subject of fraud that worries consumers, traders, and producers. The results obtained indicate that the combination of steady-state fluorescence techniques, considering mainly the characteristics of the spectra obtained with excitation at 320, 340 and 460 nm and time-resolved fluorescence with excitation around 403 nm, demonstrates the potential to differentiate oils conventional from organic soybeans oils.

81

OS-S-WED-01-03

Fluorescence spectroscopy study of conventional and organic soybean oil heated to 270 ºC

Carla Lopes (UNIFESP); Heron da Silva (UNIFESP); Lilia Courrol (UNIFESP/ICAQF)

15:20 to 15:40  ·  Room 1 (Live)

Edible vegetable oils are highly susceptible to lipid thermo-oxidation which results in the toxic substances production, with serious nutritional consequences. This work studies the fluorescence spectroscopy potential to determine oxidation status in these materials. The organic and conventional soybean oils fluorescence spectra have been studied and alterations were registered after heated at 270 ºC. Variations in chlorophyll fluorescence lifetime were analyzed to determine the pigment degradation. The results indicate that fluorescence spectroscopy is an efficient method to determine pigments degradation and increasing fatty acid oxidation products. It can be applied in the food industry and food quality control institutions.

15:40 to 16:00

Break

Sensors, Image and Illumination 2

Alexandre

16:00 to 17:40 / Room 1 (Live)

82

OS-S-WED-02-01

Cascaded refractive index and corrosion sensors in a D-Shaped optical fiber using LMR and SPR effects

Invited Paper

Vladimir Manoel da Silva Jr (UFPE); Joaquim F. Martins Filho (UFPE); Jehan Nascimento (UFPE)

16:00 to 16:30  ·  Room 1 (Live)

This article presents the proposed structure and simulation results from analytical modeling of a refractive index sensor and a corrosion sensor in a D-shaped single-mode optical fiber using the lossy mode resonance (LMR) and surface plasmon resonance (SPR) effects. The combined sensor consists of two cascaded D-shaped sensor regions. The first one, a bilayer of titanium dioxide – aluminum, operates under LMR condition. The second region, a bilayer of gold – titanium dioxide, operates under SPR condition. The sensors are interrogated by two wavelengths, 1310 and 1550 nm, in TE and TM modes. Sensor sensitivities and operating ranges are presented.

83

OS-S-WED-02-02

Imaging with a Rigid Multimode Fiber Bundle

Paloma Pellegrini (Unicamp); Claudecir Ricardo Biazoli (CTI); Paulo Jarshel (Unicamp); Lucas H. Gabrielli (Unicamp)

16:30 to 17:00  ·  Room 1 (Live)

A rigid multimode fiber bundle is proposed for imaging, in a experimental setup with no interferometric measurements. The great amount of propagating modes in the fiber bundle, along with high numerical aperture, enabled us to set predetermined focus targets in, approximately, 60 micrometers resolution. In order to do so, an optimization process to build transmission matrices was applied to overcome modal interference and obtain focus. Here, we also show that transmission matrices could be stored and combined, so focus could be simultaneously achieved in different locations, at the distal end of the fiber bundle.

84

OS-S-WED-02-03

Analysis of temperature in an air-cooled combustion motorcycle engine using sensors based on fiber Bragg gratings

Henrique Ferazza (UTFPR); Rodrigo Fiorin (UTFPR); Valmir de Oliveira (UTFPR); Ilda Abe (UTFPR); Hypolito J. Kalinowski (UFF)

17:00 to 17:10  ·  Room 1 (Live)

A fiber Bragg grating for monitoring the temperature of an air-cooled combustion motorcycle engine is presented in this study. The sensor is attached to the aluminum cylinder of the motorcycle and the characterization process is performed. We present the results of the heating and cooling curves during tests with the motorcycle at rest and in motion. A better understanding of the air cooling process can lead to the optimization of designs in this area.

Technical Session 2

14:30 to 17:10 / Room 2 (Live)

Optics and Instrumentation 1

Lino

14:30 to 15:40 / Room 2 (Live)

85

OS-O-WED-01-01

An extended cavity diode laser constructed with additive manufacturing: Contribution for a brazilian compact atomic frequency standard with cold atoms

Invited Paper

Eduardo Cazarini (IFSP Araraquara); Stela Müller (USP); Luiz Damaceno (USP); Richard Mascarin (USP); Carlos Fortulan (USP); Vanderlei Bagnato (USP); Daniel Varela Magalhães (USP)

14:30 to 15:00  ·  Room 2 (Live)

The Time and Frequency Metrology field dedicated towards more compact standards has research groups dedicated to cold atoms systems, in order to improve embedded applications. Our group has been developing a compact system using 133Cs cold atoms and already showed some versions of proof-of-principle. We developed a first prototype of an extended cavity diode laser using additive manufacturing of ABS (acrylonitrile butadiene styrene) and obtained a very light and thermally isolated version with an intracavity interference filter. We will show preliminary results of this first version and discuss some aspects of the system for the new compact frequency standard.

86

OS-O-WED-01-02

Visible and Near-Infrared Optical Characterization of Human Belly Skin Tissue and Phantoms

Luismar B. Cruz Jr (USP); Carlos Eduardo Girasol (USP); Kaio B. Barros (USP); Rinaldo Guirro (USP); Luciano Bachmann (USP); Pedro coltro (USP)

15:00 to 15:20  ·  Room 2 (Live)

Determining the optical properties of biological tissues are important for medical, technological and research applications. The main objective of this work was to determine the optical properties of biological skin tissues and phantoms from 500 to 1300 nm using integrating spheres to acquire the diffuse reflectance and transmittance light and the inverse adding doubling algorithm to compute the optical coefficients. It was acquired the optical absorption coefficients, reduced scattering and depth penetration of the human skin. Phantoms that mimic optical properties of skin were also manufactured and characterized. The skin phantoms were able to properly simulate the optical properties.

87

OS-O-WED-01-03

Analytical Solutions for TM Modes in Magneto-Optical Planar Waveguides

Licinius Dimitri Sá de Alcantara (UFRA)

15:20 to 15:40  ·  Room 2 (Live)

From Maxwell's equations, an analytical formulation is developed to calculate the propagation characteristics and field profiles of transverse magnetic (TM) modes on magneto-optical (MO) planar waveguides. Results show nonreciprocal behavior in terms of both modal effective index and field profile analyses. The proposed model can be used as a reference to assess the nonreciprocal potentialities of such structures.

15:40 to 16:00

Break

Optics and Instrumentation 2

Luciano

16:00 to 17:10 / Room 2 (Live)

88

OS-O-WED-02-01

Nonlinear imaging of biological tissues

Invited Paper

Ana Maria de Paula (UFMG)

16:00 to 16:30  ·  Room 2 (Live)

Precise diagnosis and prognosis are important in prevention and reduction of morbidity and mortality in all types of cancers. We present imaging of biological tissue by second harmonic generation and multiphoton excited fluorescence microscopy as a potential tool in helping with cancer diagnosis. We demonstrate a methodology to evaluate the changes caused by cancer in collagen and cellular parameters of histological biopsies using automated image analysis and machine learning techniques. The procedure allowed to separate between the healthy and cancerous tissue with an accuracy of around 90% for canine mammary cancer and for human prostate cancer. In addition the results for canine mammary gland carcinomas show that the measured tissue collagen parameters...

89

OS-O-WED-02-02

Development of a portable lensfree holographic microscope to imaging cell cultures

Camila de Paula D'Almeida (USP); Patrick Oliveira Feitosa (USP); Natália Portes de Oliveira (USP); Sebastião Pratavieira (USP)

16:30 to 16:50  ·  Room 2 (Live)

Microscopes are important imaging tools for accessing microscale information in a variety context, including routine visual analysis for cell culture. As an alternative to traditional optical microscopic instrumentations, lensfree microscopy is an emerging modality, which is efficient to provide portable apparatus that provides images with decoupling resolution from field of view. In this paper we present an compact and easy-to-use imaging equipment, based on optical lensfree holographic microscopy, which performs amplitude and phase images from a sequence ofcaptured images at different distances from the sample, resulting in images with almost 30 squared millimeters and 4 micrometers of resolution.

90

OS-O-WED-02-03

Image haziness contrast scale describing optical scattering depth

André Riccieri Albinati Vitor (USP); George C. Cardoso (USP)

16:50 to 17:10  ·  Room 2 (Live)

Contrast is not uniquely defined in the literature. In particular, there is a need for a contrast measure that scales linearly and monotonically with the optical scattering depth of a translucent scattering layer that covers an image. Here, we address this issue proposing an image contrast metric, which we call haziness contrast metric, and experimentally test it using milk as a scattering medium to simulate a decline in image contrast. Compared to other contrast metrics in the literature, the proposed metric is the closest to linear, as a function of the increasing density of the scattering material on the image.

Tutorial Session 1

14:30 to 16:55 / Room 3 (Live)

Integrated Photonics and Optoelectronics

Daniel

14:30 to 16:55 / Room 3 (Live)

91

TS-I-WED-01-01

How to develop your PIC-based product – from prototype to production

Giovanni Farias (VLC Photonics, Spain)

14:30 to 15:15  ·  Room 3 (Live)

Photonic Integrated Circuits technologies bring several advantages compared to traditional bulk products that are based on discrete components. In this tutorial, the workflow for the development of products based on Photonic Integrated Circuits (PIC) will be presented. The steps of a full development cycle, from system concept to test and packaging will be reviewed. The PIC platforms available for fabrication will be presented and compared, and their maturity will be discussed. Finally, a discussion about the Technology Readiness Levels (TRLs) and the requirements for each step, from prototype to pre-production will be made.

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15:15 to 15:20

Break

92

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Thiago Alegre (Unicamp)

15:20 to 16:05  ·  Room 3 (Live)

BREAK

16:05 to 16:10

Break

93

TS-I-WED-01-03

Roberto Panepucci (CTI)

16:10 to 16:55  ·  Room 3 (Live)

Tutorial Session 2

14:30 to 16:55 / Room 4 (Live)

Biophotonics

Sebastião

14:30 to 16:55 / Room 4 (Live)

94

TS-B-WED-01-01

Protoporphyrin IX: An Endogenous Theranostic Compound

Lilia Courrol (UNIFESP)

14:30 to 15:15  ·  Room 4 (Live)

Porphyria, cancer, and atherosclerosis patients manifest increased concentration of protoporphyrin IX (PpIX) in tissues and blood, and PpIX fluorescence can be used to diagnose these diseases. This review will describe the role of PpIX inside the cells and organisms. Diagnosis and therapy approaches using PpIX will be described. Finally, we will also evaluate if PpIX could be used to diagnose and treat Covid-19 since an abnormal phenomenon related to hemoglobin dysfunction was observed in the patients with this disease

BREAK

15:15 to 15:20

Break

95

TS-B-WED-01-02

Machine Learning methods for micro-FTIR imaging classification of human skin tumors

Denise Zezell (IPEN)

15:20 to 16:05  ·  Room 4 (Live)

BREAK

16:05 to 16:10

Break

96

TS-B-WED-01-03

Antimicrobial Photodynamic Therapy

Cristina Kurachi (USP)

16:10 to 16:55  ·  Room 4 (Live)

Antimicrobial photodynamic therapy (aPDT) uses the combination of photosensitizer, light and oxygen to induce microorganism death for the local treament of infected tissues. Its mechanism of action is based on the production of reactive species, mostly singlet oxygen, resulting in the oxidative damage of any biomolecule nearby where the photosensitizer is located. If minimal conditions of local photosensitizer and oxygen concentrations and light dose are achieved, microorganism inactivation is induced. One of the main advantages of aPDT is due to its action being non-biological site specific, so inactivation of distinct species of bacteria, fungi and virus are observed, and antimicrobial resistance is highly unfeasible. Examples of aPDT applications will be...

Photonics' Laboratories Tour

8:00 to 17:00 / Conference Website (On Demand)

Offline Q&A

97

PLT-WED-01-01

8:00 to 17:00  ·  Conference Website (On Demand)

98

PLT-WED-01-02

8:00 to 17:00  ·  Conference Website (On Demand)

99

PLT-WED-01-03

8:00 to 17:00  ·  Conference Website (On Demand)

100

PLT-WED-01-04

8:00 to 17:00  ·  Conference Website (On Demand)

101

PLT-WED-01-05

8:00 to 17:00  ·  Conference Website (On Demand)

102

PLT-WED-01-06

8:00 to 17:00  ·  Conference Website (On Demand)

103

PLT-WED-01-07

8:00 to 17:00  ·  Conference Website (On Demand)

104

PLT-WED-01-08

8:00 to 17:00  ·  Conference Website (On Demand)

105

PLT-WED-01-09

8:00 to 17:00  ·  Conference Website (On Demand)

106

PLT-WED-01-10

8:00 to 17:00  ·  Conference Website (On Demand)

107

PLT-WED-01-11

8:00 to 17:00  ·  Conference Website (On Demand)

108

PLT-WED-01-12

8:00 to 17:00  ·  Conference Website (On Demand)

109

PLT-WED-01-13

8:00 to 17:00  ·  Conference Website (On Demand)

110

PLT-WED-01-14

8:00 to 17:00  ·  Conference Website (On Demand)

Students' Paper Competition Awards and Closing Ceremony

17:15 to 17:45 / Room 1 (Live)

SBFoton 2021 General Chair and SBFoton President

Alexandre

17:15 to 17:45 / Room 1 (Live)

Organizer

Sponsors

Support

The Brazilian Photonics Society has begun its activities on May 24th, 2017 with the main objective to work for increasing the importance and awareness of optics and photonics in Brazil and South America.

To contact SBFoton and take active part in this movement, send an email to conference@sbfoton.org.br.

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