Zobrazeno 1 - 10
of 187
pro vyhledávání: '"Tero Setälä"'
Autor:
Aleksi Leinonen, Antti Hannonen, Henri Partanen, Janne Heikkinen, Tero Setälä, Ari T. Friberg, Tommi K. Hakala
Publikováno v:
Communications Physics, Vol 6, Iss 1, Pp 1-8 (2023)
Abstract The geometric phase for classical electromagnetic light beams, in its original formulation as introduced by Pancharatnam, concerns fields experiencing cyclic, discrete in-phase polarization-state changes. A similar phase was later recognized
Externí odkaz:
https://doaj.org/article/37eb0e63b6ae42de9b4792bb4fed8fbd
Publikováno v:
Photonics, Vol 10, Iss 9, p 1050 (2023)
Equiprobable incoherent mixtures of two totally polarized states of light whose associated three-dimensional Jones vectors are mutually orthogonal are called discriminating states and constitute a peculiar type of state that plays a key role in the c
Externí odkaz:
https://doaj.org/article/2dc000420a2b468ab39fee9d6bb56e48
Publikováno v:
Journal of the European Optical Society-Rapid Publications, Vol 13, Iss 1, Pp 1-5 (2017)
Abstract Background The spectral polarization state and dimensionality of random light are important concepts in modern optical physics and photonics. Methods By use of space-frequency domain coherence theory, we establish a rigorous classification f
Externí odkaz:
https://doaj.org/article/ee4cb6258f4f424bbe1cca39c05e9165
Publikováno v:
Photonics, Vol 8, Iss 3, p 85 (2021)
The two-point counterparts of the traditional Stokes parameters, which are called the coherence Stokes parameters, have recently been extensively used for assessing the coherence properties of random electromagnetic light beams. In this work, we high
Externí odkaz:
https://doaj.org/article/b0bff784e01f45669f50f617209b8931
Autor:
Benjamin O Asamoah, Henri Partanen, Sughra Mohamed, Janne Heikkinen, Atri Halder, Matias Koivurova, Marek Nečada, Tero Setälä, Jari Turunen, Ari T Friberg, Tommi K Hakala
Publikováno v:
New Journal of Physics, Vol 23, Iss 6, p 063037 (2021)
We study beaming properties of laser light produced by a plasmonic lattice overlaid with organic fluorescent molecules. The crossover from spontaneous emission regime to stimulated emission regime is observed in response to increasing pump fluence. T
Externí odkaz:
https://doaj.org/article/3dc847a30e4a4873a2f12229e475235b
Publikováno v:
New Journal of Physics, Vol 23, Iss 6, p 063059 (2021)
While the spin of two-dimensional polarization states admits a simple representation, its physical interpretation for three-dimensional (3D) mixed polarization states requires a more involved analysis. In this work, we address the spin structure of t
Externí odkaz:
https://doaj.org/article/01bfe2bec0414e5389e93ec264eda667
Measurement of intensity and polarization beatings in the interference of independent optical fields
Autor:
Andriy Shevchenko, Tero Setälä
Publikováno v:
Physical Review Research, Vol 2, Iss 1, p 012053 (2020)
We experimentally study the intensity and polarization beatings of interfering independent optical fields. Using the tools of intensity interferometry, we measure the beating harmonicity time and the degree of randomness of the polarization beating f
Externí odkaz:
https://doaj.org/article/a38bf80a37914c0ca4af488e0b88013f
Autor:
Antti Hannonen, Kimmo Saastamoinen, Lasse-Petteri Leppänen, Matias Koivurova, Andriy Shevchenko, Ari T Friberg, Tero Setälä
Publikováno v:
New Journal of Physics, Vol 21, Iss 8, p 083030 (2019)
Beating is a simple physical phenomenon known for long in the context of sound waves but remained surprisingly unexplored for light waves. When two monochromatic optical beams of different frequencies and states of polarization interfere, the polariz
Externí odkaz:
https://doaj.org/article/afa1058bb4ca4dea90a29394963392ea
Publikováno v:
New Journal of Physics, Vol 16, Iss 11, p 113059 (2014)
We introduce an interferometric interpretation for the degree of polarization as a quantity characterizing the ability of a light beam to generate polarization modulation when it interferes with itself. The result is confirmed experimentally in Young
Externí odkaz:
https://doaj.org/article/9f5feb660dea49b58715541c786a72e6
Publikováno v:
Applied Physics Letters. 122
We propose a protocol for compact and efficient synthesis of a random vectorial source with a higher-order Poincaré (HOP) polarization state encoded into the spatial coherence structure. The procedure is based on the complex-random-mode representati