Dr. Bruno Gonzalez-Izquierdo Profile

Dr. Bruno Gonzalez-Izquierdo

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Publications (5)

Proceedings Article | 8 June 2023 Poster + Paper

Instruments for best target position determination in the high-intensity laser-solid interaction experiment

Eugene Vishnyakov, Akito Sagisaka, Koichi Ogura, Tatiana Pikuz, Chris Armstrong, Sergey Pikuz, Bruno Gonzalez-Izquierdo, Timur Zh. Esirkepov, Wenchao Yan, Tae Moon Jeong, Sushil Singh, Prokopis Hadjisolomou, Ondrej Finke, Gabriele Maria Grittani, Michal Nevrkla, Carlo Maria Lazzarini, Andriy Velyhan, Takehito Hayakawa, Yuji Fukuda, James Koga, Masahiko Ishino, Kotaro Kondo, Yasuhiro Miyasaka, Akira Kon, Masaharu Nishikino, Yevhen Nosach, Danila Khiklukha, Ilya Tsygvintsev, Deepak Kumar, Jaroslav Nejdl, Daniele Margarone, Pavel Sasorov, Masaki Kando, Hiromitsu Kiriyama, Georg Korn, Kiminori Kondo, Sergei Bulanov, Tetsuya Kawachi, Alexander Pirozhkov

Proceedings Volume 12582, 125820E (2023) https://doi.org/10.1117/12.2665527

KEYWORDS: Diagnostics, Spectroscopy, X-rays, Extreme ultraviolet, Specular reflections, Spectrographs, Electrons, Scintillators

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Proceedings Article | 18 April 2021 Presentation

High-order mode structure and spectral interferometry in ultrathin foils: underpinning physics of transparency-enhanced ion acceleration

Paul McKenna, Martin King, Matthew Duff, Robbie Wilson, Bruno Gonzalez-Izquierdo, Adam Higginson, Samuel D. Williamson, Zoë Davidson, Remi Capdessus, Nicola Booth, Steven Hawkes, David Neely, Ross Gray

Proceedings Volume 11779, 117790J (2021) https://doi.org/10.1117/12.2589585

KEYWORDS: Ions, Interferometry, Polarization, Physics, Transparency, Optical testing, Superposition, Structured light, Particles, Optical simulations

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The spatio-temporal and polarisation properties of intense light is important in wide-ranging topics at the forefront of intense light-matter interactions, including laser-driven particle acceleration. In the context of experiments to optimize transparency-enhanced ion acceleration in expanding ultrathin foils, we investigate the polarisation and temporal properties of intense light measured at the rear of the target. An effective change in the angle of linear polarisation of the light results from a superposition of coherent radiation, generated by a directly accelerated bipolar electron distribution, and the light transmitted due to the onset of relativistic self-induced transparency. Simulations show that the generated light has a high-order transverse electromagnetic mode structure in both the first and second laser harmonics that can evolve on intra-pulse time-scales. The mode structure and polarisation state vary with the interaction parameters, opening up the possibility of developing this approach to achieve dynamic control of structured light fields at ultrahigh intensities [1]. We also report on frequency-resolved optical gating measurements of the light which demonstrate a novel and simple approach to diagnose the time during the interaction at which the foil becomes transparent to the laser light. This is a key parameter for optimising ion acceleration in expanding ultrathin foils. Coherent transition radiation produced at the foil rear interferes with laser light transmitted through the foil producing spectral fringes. The fringe spacing enables the relative timing of the onset of transmission with respect to the transition radiation generation to be determined. This self-referencing approach to spectral interferometry provides a route to optically controlling and optimising ion acceleration from ultrathin foils undergoing transparency [2]. [1] M.J. Duff et al., Scientific Reports 10, 105 (2020) [2] S.D.R. Williamson et al., Phys. Rev. Applied 14, 034018 (2020)

Proceedings Article | 28 February 2012 Paper

Temperature effects on the characterization of new quantum dot dual mode lasers for terahertz generation

B. Gonzalez, H. Lamela, E. Dadrasnia, V. Sichkovskyi, K. Kozhuharov, J. P. Reithmaier

Proceedings Volume 8255, 82550C (2012) https://doi.org/10.1117/12.910095

KEYWORDS: Laser damage threshold, Semiconductor lasers, Quantum dots, Temperature metrology, Quantum efficiency, Terahertz radiation, Quantum wells, Tunable lasers, Extremely high frequency, Transparency

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Proceedings Article | 28 February 2012 Paper

Thermally tunable DFB dual mode laser diode by an external platinum thin-film heater for THz generation

E. Dadrasnia, B. Gonzalez, H. Lamela, K. Kozhuharov, V. Sichkovskyi, J. P. Reithmaier

Proceedings Volume 8255, 825512 (2012) https://doi.org/10.1117/12.910097

KEYWORDS: Terahertz radiation, Platinum, Semiconductor lasers, Tunable lasers, Semiconductors, Thin films, Thermal effects, Continuous wave operation, Resistance, Laser applications

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Proceedings Article | 21 February 2011 Paper

New modeling of laterally coupled diode lasers: analysis and comparison with experimental results

B. González, H. Lamela, R. Santos

Proceedings Volume 7933, 79331P (2011) https://doi.org/10.1117/12.876264

KEYWORDS: Waveguides, Waveguide lasers, Semiconductor lasers, Modulation, Laser damage threshold, Laser resonators, Laser systems engineering, Diffusion, Optical simulations, Optoelectronics

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