Prof. Valerio Pruneri Profile

Prof. Valerio Pruneri

Group Leader at ICFO - Institut de Ciències Fotòniques

SPIE Involvement:

Conference Program Committee | Conference Chair | Author | Student Chapter Advisor

Publications (18)

PROCEEDINGS ARTICLE | September 18, 2018

Integrated quantum entropy sources (Conference Presentation)

Proc. SPIE. 10733, Quantum Photonic Devices 2018

KEYWORDS: Semiconductors, Indium, Diffusion, Semiconductor lasers, Silicon photonics, Information security

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PROCEEDINGS ARTICLE | October 16, 2017

Transparent and conductive backside coating of EUV lithography masks for ultra short pulse laser correction

Proc. SPIE. 10451, Photomask Technology

KEYWORDS: Multilayers, Electrodes, Metals, Nickel, Coating, Resistance, Chromium, Photomasks, Extreme ultraviolet, Extreme ultraviolet lithography

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PROCEEDINGS ARTICLE | November 3, 2016

Complete optical absorption of ultrashort pulses by plasmons in nanostructured graphene (Conference Presentation)

Proc. SPIE. 9932, Carbon Nanotubes, Graphene, and Emerging 2D Materials for Electronic and Photonic Devices IX

KEYWORDS: Ultrafast phenomena, Mid-IR, Plasmons, Nanostructuring, Modulation, Graphene, Optoelectronics, Absorption

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The peculiar electronic structure of graphene results in a large optoelectronic response that holds great potential for technology. For example, this material exhibits a nearly constant absorption ~2.3% over a broad spectral range [1], which can be electrically modulated in the mid-IR by injecting attainable densities of charge carriers. When doped, graphene can sustain plasmons that radically modify its optical response, enabling complete optical absorption for suitably designed patterns [2]. Graphene nanoribbons constitute one of the simplest geometrical patterns that one can produce. They have been extensively studied and their plasmons accurately explained with simple models [3]. When heated to a large electronic temperature, graphene behaves nearly as if is was highly doped, also giving rise to plasmon modes [4]. In this work, we study the possibility of using ultrashort light pulses together with the natural electronic relaxation mechanisms in graphene nanoribbons as a way to tune their optical response. We first discuss the optically induced plasmons of individual nanoribbons when illuminated with ultrashort pulses and then analyze the evolution of the plasmon frequency as a function of the delay between pump and probe. We study the redshift of these plasmons with increasing delay due to electron relaxation. We also investigate the optical response of the ribbon exposed to a train of optical pulses. We further discuss ribbon arrays illuminated from the substrate under total internal reflection conditions, for which we predict complete absorption for a suitable choice of geometrical and illumination parameters. References [1] F. H. L. Koppens, D. E. Chang, and F. J. García de Abajo, Nano Letters 11, 3370-3377 (2011) [2] S. Thongrattanasiri, F. H. L. Koppens, and F. J. García de Abajo, Phys. Rev. Lett. 108, 047401 (2012) [3] I. Silveiro, J. M. Plaza Ortega, and F. J. García de Abajo, Light: Science and Applications 4, e241 (2015) [4] F. J. García de Abajo, ACS Photon. 1, 135 (2014).

PROCEEDINGS ARTICLE | March 7, 2014

Ultrathin metals and nano-structuring for photonic applications

Proc. SPIE. 8982, Optical Components and Materials XI

KEYWORDS: Antireflective coatings, Transparency, Electrodes, Metals, Ultraviolet radiation, Remote sensing, Copper, Nickel, Transmittance, Tellurium

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SPIE Journal Paper | March 23, 2012

Microstructured optical fiber interferometric breathing sensor

Fávero, Fernando , Pruneri, Valerio , Villatoro, Joel

JBO Vol. 17 Issue 03

KEYWORDS: Sensors, Interferometers, Interferometry, Cladding, Reflection, Single mode fibers, Structured optical fibers, Optical fibers, Fusion splicing, Fiber optics sensors

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PROCEEDINGS ARTICLE | December 6, 2011

Functional photonic crystal fiber sensing devices

Proc. SPIE. 8307, Passive Components and Fiber-Based Devices VIII

KEYWORDS: Optical fibers, Refractive index, Photonic crystal fibers, Reflection, Interferometers, Cladding, Sensors, Single mode fibers, Fusion splicing, Liquids

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PROCEEDINGS ARTICLE | October 26, 2011

High-visibility photonic crystal fiber interferometer for ultrasensitive refractometric sensing

Proc. SPIE. 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World

KEYWORDS: Optical fibers, Refractive index, Photonic crystal fibers, Interferometers, Cladding, Sensors, Interferometry, Single mode fibers, Fiber optics sensors, Fusion splicing

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PROCEEDINGS ARTICLE | May 18, 2011

Performance of a high-temperature sensor based on regenerated fiber Bragg gratings

Proc. SPIE. 7753, 21st International Conference on Optical Fiber Sensors

KEYWORDS: Packaging, Optical fibers, Fiber Bragg gratings, Sensors, Metals, Annealing, Ceramics, Fiber optics sensors, Temperature sensors, Temperature metrology

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PROCEEDINGS ARTICLE | October 14, 2010

Photonic-crystal and optical micro/nano fiber interferometric sensors

Proc. SPIE. 7839, 2nd Workshop on Specialty Optical Fibers and Their Applications (WSOF-2)

KEYWORDS: Refractive index, Microfluidics, Biosensing, Photonic crystal fibers, Interferometers, Sensors, Interferometry, Single mode fibers, Fiber optics sensors, Photonic microstructures

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PROCEEDINGS ARTICLE | September 9, 2010

Wavelength encoded fiber sensor for extreme temperature range

Proc. SPIE. 7653, Fourth European Workshop on Optical Fibre Sensors

KEYWORDS: Optical fibers, Refractive index, Modulation, Fiber Bragg gratings, Sensors, Annealing, Germanium, Fiber optics sensors, Standards development, Temperature metrology

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PROCEEDINGS ARTICLE | May 14, 2010

Evaluation of serial multiplexed photonic crystal fiber interferometric sensors

Proc. SPIE. 7726, Optical Sensing and Detection

KEYWORDS: Photonic crystal fibers, Spatial frequencies, Interferometers, Sensors, Fourier transforms, Interferometry, Multiplexing, Fiber optics sensors, Sensor networks, Intermodulation

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PROCEEDINGS ARTICLE | May 14, 2010

Chemical composition gratings in Germanium doped and Boron-Germanium co-doped fibers

Proc. SPIE. 7726, Optical Sensing and Detection

KEYWORDS: Optical fibers, Refractive index, Modulation, Fiber Bragg gratings, Annealing, Germanium, Hydrogen, Telecommunications, Standards development, Temperature metrology

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PROCEEDINGS ARTICLE | October 5, 2009

Highly versatile in-reflection photonic crystal fibre interferometer

Proc. SPIE. 7503, 20th International Conference on Optical Fibre Sensors

KEYWORDS: Optical fibers, Refractive index, Biosensing, Photonic crystal fibers, Interferometers, Cladding, Gases, Single mode fibers, Fusion splicing, Liquids

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PROCEEDINGS ARTICLE | April 28, 2009

High-sensitivity photonic crystal fiber interferometer for chemical vapors detection

Proc. SPIE. 7316, Fiber Optic Sensors and Applications VI

KEYWORDS: Optical fibers, Refractive index, Light emitting diodes, Photonic crystal fibers, Waveguides, Interferometers, Spectroscopy, Molecules, Gases, Liquids

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PROCEEDINGS ARTICLE | July 7, 2005

Advanced electro-optical transmitters

Proc. SPIE. 5840, Photonic Materials, Devices, and Applications

KEYWORDS: Optical fibers, Transmitters, Eye, Modulation, Dispersion, Electrodes, Networks, Modulators, Electro optics, Tolerancing

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PROCEEDINGS ARTICLE | June 14, 2004

Identification of LiNbO3 compositions with optimized functional properties for advanced electro-optical devices

Proc. SPIE. 5350, Optical Components and Materials

KEYWORDS: Lithium, Waveguides, Ultraviolet radiation, Crystals, Diffusion, Modulators, Raman spectroscopy, Electro optics, Temperature metrology, Absorption

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SPIE Conference Volume | April 15, 2003

Fiber-based Component Fabrication, Testing, and Connectorization

PROCEEDINGS ARTICLE | June 18, 2002

Poled glass compared to ferroelectrics for electro-optics and nonlinear frequency conversion in optical waveguides

Proc. SPIE. 4640, Integrated Optics: Devices, Materials, and Technologies VI

KEYWORDS: Second-harmonic generation, Switches, Modulation, Silica, Waveguides, Dispersion, Glasses, Luminescence, Electro optics, Frequency conversion

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