206 research outputs found
Optical manipulation of microscopic objects by means of vertical-cavity surface-emitting laser array sources
This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/AO.40.005430 Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law
Observation of a stacking process of microparticles with multiple beams
This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/AO.44.003271 Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law
Optical levitation and translation of a microscopic particle by use of multiple beams generated by vertical-cavity surface-emitting laser array sources
This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/AO.41.005645 Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law
Stacking and translation of microscopic particles by means of 2×2 beams emitted from a vertical-cavity surface-emitting laser array
Copyright 2003 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters, 82(18), 2969-2971, 2003 and may be found at http://dx.doi.org/10.1063/1.157093
Discrete correlation processor as a building core of a digital optical computing system : architecture and optoelectronic embodiment
This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/AO.38.007276 Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law
Wavelength-multiplexing diffractive phase elements : design, fabrication, and performance evaluation
This paper was published in Journal of the Optical Society of America A and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/JOSAA.18.001082 Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law
Optoelectronic parallel-matching architecture : architecture description, performance estimation, and prototype demonstration
This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/AO.40.000283 Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law
Spatial-photonic Boltzmann machines: low-rank combinatorial optimization and statistical learning by spatial light modulation
The spatial-photonic Ising machine (SPIM) [D. Pierangeli et al., Phys. Rev.
Lett. 122, 213902 (2019)] is a promising optical architecture utilizing spatial
light modulation for solving large-scale combinatorial optimization problems
efficiently. However, the SPIM can accommodate Ising problems with only
rank-one interaction matrices, which limits its applicability to various
real-world problems. In this Letter, we propose a new computing model for the
SPIM that can accommodate any Ising problem without changing its optical
implementation. The proposed model is particularly efficient for Ising problems
with low-rank interaction matrices, such as knapsack problems. Moreover, the
model acquires learning ability and can thus be termed a spatial-photonic
Boltzmann machine (SPBM). We demonstrate that learning, classification, and
sampling of the MNIST handwritten digit images are achieved efficiently using
SPBMs with low-rank interactions. Thus, the proposed SPBM model exhibits higher
practical applicability to various problems of combinatorial optimization and
statistical learning, without losing the scalability inherent in the SPIM
architecture.Comment: 7 pages, 5 figures (with a 3-page supplemental
Regeneration of spermatogenesis by mouse germ cell transplantation into allogeneic and xenogeneic testis primordia or organoids
Gametogenesis requires close interactions between germ cells and somatic cells. Derivation of sperm from spermatogonial stem cells (SSCs) is hampered by the inefficiency of spermatogonial transplantation technique in many animal species because it requires a large number of SSCs and depletion of endogenous spermatogenesis. Here we used mouse testis primordia and organoids to induce spermatogenesis from SSCs. We microinjected mouse SSCs into embryonic gonads or reaggregated neonatal testis organoids, which were transplanted under the tunica albuginea of mature testes. As few as 1 × 10⁴ donor cells colonized both types of transplants and produced sperm. Moreover, rat embryonic gonads supported xenogeneic spermatogenesis from mouse SSCs when transplanted in testes of immunodeficient mice. Offspring with normal genomic imprinting patterns were born after microinsemination. These results demonstrate remarkable flexibility of the germ cell-somatic cell interaction and raise new strategies of SSC manipulation for animal transgenesis and analysis of male infertility
Spatial-photonic Ising machine by space-division multiplexing with physically tunable coefficients of a multi-component model
This paper proposes a space-division multiplexed spatial-photonic Ising
machine (SDM-SPIM) that physically calculates the weighted sum of the Ising
Hamiltonians for individual components in a multi-component model.
Space-division multiplexing enables tuning a set of weight coefficients as an
optical parameter and obtaining the desired Ising Hamiltonian at a time. We
solved knapsack problems to verify the system's validity, demonstrating that
optical parameters impact the search property. We also investigated a new
dynamic coefficient search algorithm to enhance search performance. The
SDM-SPIM would physically calculate the Hamiltonian and a part of the
optimization with an electronics process.Comment: 12 pages, 5 figure
- …