Invited Papers

8

Fourier-Transform Infrared spectroscopy versus antibodies chemiluminescent immunoassay for COVID-19 diagnosis

Invited Paper

Herculano da Silva Martinho (UFABC); José Angelo Lauletta Lindoso (USP); Paulo Henrique Braz da Silva (USP); Carla Carolina Bandeira (UFABC)

► 14:30 to 15:00  ·  Hall A  ·  Biophotonics 1

COVID-19 is a World sanitary emergency. The tragedy related to this epidemic disease evolves actually more than 100 million confirmed cases and at least 2 million deaths. In this work we investigate whether FTIR operating under blood serum samples is viable option for COVID-19 diagnosis and fatality prediction. The performance of FTIR was compared to chemiluminescence immunoassay for anti-SARS-CoV-2 IgM and IgG antibodies in order to discuss vantages and advantages and viability for point-of-care applications

11

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Invited Paper

Vladislav V. Yakovlev (Texas AM&U)

► 16:00 to 16:30  ·  Hall A  ·  Biophotonics 2

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12

Salivary infrared spectroscopy: A new horizon on diagnostic to systemic and emerging diseases

Invited Paper

Robinson Sabino da Silva (UFU)

► 16:30 to 17:00  ·  Hall A  ·  Biophotonics 2

The diagnostic of chronic diseases as diabetes, breast cancer, and chronic kidney diseases is invasive, and costly. In this context, emerging diseases also need improvement in the diagnosis. Consequently, the search for a sustainable, reagent-free, more cost-effective and non-invasive diagnostic platform is critical to public health. In this way, salivary biomarkers are an attractive alternative for early detection of systemic diseases. Salivary diagnosis offers several advantages than others biofluids. The attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectrometry is a global, high-sensitive and highly reproducible analytical platform that detects molecular components. Here, we propose to exploit the advances of ATR-FTIR platforms to...

15

Recent advances in machine learning-enabled inverse system design

Invited Paper

Uiara Celine de Moura (DTU Fotonik)

► 14:30 to 15:00  ·  Hall B  ·  Optical Communication 1

The traditional procedure to design optical devices consists of starting with an initial set of parameters (normally based on the designer's previous knowledge) and performing some parameter sweep around the initial condition to improve the device performance. This human-controlled design approach has two key drawbacks: it is time-consuming/work-intensive and tends to ignore solutions that could have better performance but are far from the initial guess. Based on the idea that the underlying features in a given data set can be automatically learned through specific algorithms, machine learning techniques have been successfully applied in optical communication systems and integrated photonics. They are employed to learn complex functions and perform the...

18

FEC-assisted Nonlinearity Compensation for Coherent Optical Receivers

Invited Paper

Edson Porto da Silva (UFCG)

► 16:00 to 16:30  ·  Hall B  ·  Optical Communication 2

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An overview of the FEC-assisted digital signal processing (DSP) techniques for fiber nonlinearity compensation (NLC) in coherent optical receivers is presented, with focus on DSP schemes that are able to improve the performance of NLC by using hard or soft information feedback from FEC-decoders. Challenges and new research directions are discussed.

44

Laser wakefield electron accelerator: possible use for radioisotope production

Invited Paper

Nilson Dias Vieira Junior (IPEN); Edison Puig Maldonado (ITA); Alexandre Bonatto (UFCSPA); Roger Pizzato Nunes (UFRGS); Sudeep Banerjee (Arizona State University); Frederico Antonio Genezini (IPEN); Mauricio Moralles (IPEN); Armando V. F. Zuffi (IPEN); Ricardo E. Samad (IPEN)

► 14:30 to 15:00  ·  Hall A  ·  Lasers 1

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Recently, lasers with peak power on the TW level operating at 1 kHz have been used to produce quasimonoenergetic electron beams with good quality and energy in the 15 MeV range, by laser wakefield acceleration (LWFA). Due to the fast growth of the repetition rates of this class of lasers, practical applications such as the production of gamma rays to initiate photofission nuclear reactions, in order to produce medical systems, capable of matching the resonant acceleration conditions (few-fs, several-mJ pulses), are now available.

47

Synchrotron infrared nanospectroscopy as a game changer in nanophotonics

Invited Paper

Raul de Oliveira Freitas (National Synchrotron Light Laboratory (LNLS), Br)

► 16:00 to 16:30  ·  Hall A  ·  Lasers 2

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Modern technological applications share a variety of common demands, especially the need for smaller functional devices operating with unprecedented data processing power. Hence, nanoscale devices for light traffic are promising candidates for that end. Therefore, a set of advances are required to drive research into real-world applications in this area, including disruptive advances in the available characterization tools. This work presents an overview of how synchrotron infrared nanospectroscopy has contributed to the progress of nanophotonics. Technique description, data processing, and recent studies highlight the uniqueness of the technique for accessing nano-optical phenomena in novel quantum materials.

50

New Opportunities with Old Materials

Invited Paper

Marko Loncar (Harvard College)

► 14:30 to 15:00  ·  Hall B  ·  Integrated Photonics and Optoelectronics 1

Lithium niobate (LN) is an “old” material with many applications in optical and microwave technologies, owing to its strong electro-optic (EO) coefficient, second order nonlinearity, and piezoelectricity. Conventional – discrete – LN components, the workhorse of the optoelectronic industry for many decades, are reaching their limits, however. I will discuss the development of integrated LN photonic platform aimed at applications in optical communications (classical and quantum) and microwave photonics. Examples include high-performance (EO) modulators, EO and Kerr frequency combs, ad frequency converters.

Diamond is another “old” material with remarkable properties! It is transparent from the ultra-violet to infrared, has a high refractive index,...

53

Optical properties of 2D materials and potential applications for integrated photonics

Invited Paper

Christiano José Santiago de Matos (Mackgraphe)

► 16:00 to 16:30  ·  Hall B  ·  Integrated Photonics and Optoelectronics 2

In this talk, I will review our recent work on the optical characterization of various 2D materials, with emphasis on the nonlinear optical characterization, and discuss their potential to add functionality to integrated photonic devices.

79

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  ·  Hall A  ·  Sensors, Image and Illumination 1

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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.

82

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  ·  Hall A  ·  Sensors, Image and Illumination 2

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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.

85

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  ·  Hall B  ·  Optics and Instrumentation 1

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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.

88

Nonlinear imaging of biological tissues

Invited Paper

Ana Maria de Paula (UFMG)

► 16:00 to 16:30  ·  Hall B  ·  Optics and Instrumentation 2

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...