Paper list

2011

T. Hoshino, S. Banerjee, J. B. Cole, M. Itoh, T. Yatagai: “Shape analysis of wavelength-insensitive grating in the resonance domain,” Opt. Commun., 284 (2011) 2466-2472.

2009

T. Hoshino, S. Banerjee, M. Itoh, and T. Yatagai: “Diffraction pattern of triangular grating in the resonance domain,” J. Opt. Soc. Am. A, 26 (2009) 715-722.

2007

T. Hoshino, M. Itoh, and T. Yatagai: “An antireflective grating in the resonance domain for displays,” Appl. Opt., 46 (2007) 648-656.
T. Hoshino, S. Banerjee, M. Itoh, and T. Yatagai: “Design of a wavelength independent grating in the resonance domain,” Appl. Opt., 46 (2007) 7948-7962.

In the resonance domain, the diffraction intensity and its pattern is sensitive to size and shape. Diffraction intensity changes periodically against wavelength. The amplitude of the modulation tends to be large when the size of the particle is near wavelength. Some of the dependency is explained by the positional relationship of the electric field and the outline of the scatterer.

Rigorous simulation considering polarization

Paper list

2013

T. Hoshino, T. Yatagai, and M. Itoh: “Scatterometry of Slant Incidence to Isolated Scatterers for High-Density Memory.,” Jpn. J. Appl. Phys., 52 (2013) 09LA05.

2012

T. Hoshino, T. Yatagai, and M. Itoh: “A Columnar Model Explaining Long-Term Memory,” Optical Memory and Neural Networks(Information Optics), 21(4) (2012) 209-218.
T. Hoshino, T. Yatagai, and M. Itoh: “Precise and rapid distance measurements by scatterometry,” Opt. Express, 20 (2012) 3954-3966.

To get the relationship between the diffraction pattern and the shape, we are to calculate the diffraction pattern in the far-field about an unknown isolated particle. We have not had the proper calculation method for the purpose at the level of wave optics.

Measurement of a single particle

Paper list

2021

Tetsuya Hoshino, Banerjee Saswatee, Sadao Aoki, and Masahide Itoh, "Reflection analysis of absorbing film with diffractive structures for incoherent light by rigorous coupled-wave analysis," Appl. Opt. XX, (2021)XX-XX. DOI: 10.1364/AO.430599 (posted 29 Jul 2021, in press).

2020

Tetsuya Hoshino, Masahiko Shiono, Banerjee Saswatee, Sadao Aoki, Kenji Sakurai, and Masahide Itoh, "High accuracy cross-sectional shape analysis by coherent soft x-ray diffraction," Appl. Opt. 59, (2020) 8661-8667.

Tetsuya Hoshino and Takaaki Fukamizu and Sadao Aoki and Masahide Itoh, "Quasicrystal hole array as X-ray focusing optical element," Appl. Phys. Express 13(10) (2020) 102004.

2017

T. Hoshino, N. Watanabe, S. Aoki, K. Sakurai, and M. Itoh “Cross-sectional particle measurement in the resonance domain on the substrate through scatterometry,” Opt. Express, 25 (2017) 26329-26348.

2016

T. Hoshino, T. Yatagai, and M. Itoh: “Optical Memory Model of the Human Brain ” Chapter 7. In: Spatial, Long-and Short-Term Memory: Functions,Differences and Effects of Injury. Nova Science Publishers, Inc. (2016) 115-132.

2015

T. Hoshino and M. Itoh: “Cross-sectional shape evaluation of a particle by scatterometry.,” Opt. Commun., 359 (2016) 240-244.

The diffraction intensity of a single particle is weak and the position is not specified. Therefore, the focusing of light on the particle is indispensable to locate the particle and get enough diffraction intensity. The problem is the method to know that the beam spot is on the particle.

Brain model by optical memory

Paper list

2016

T. Hoshino, T. Yatagai, and M. Itoh: “Optical Memory Model of the Human Brain ” Chapter 7. In: Spatial, Long-and Short-Term Memory: Functions,Differences and Effects of Injury. Nova Science Publishers, Inc. (2016) 115-132.

2012

T. Hoshino, T. Yatagai, and M. Itoh: “A Columnar Model Explaining Long-Term Memory,” Optical Memory and Neural Networks(Information Optics), 21(4) (2012) 209-218.

The engram of the memory is not clear, though there are hundreds of the brain memory model.
The usefulness of hologram memory as the model of brain memory was emphasized by Gabor at first.
It is important because it has the function of associative memory in the model. One of the characters of the hologram memory is that it has information about distance. Distance has information about more than one bit.
Considering the large capacity of the brain, one neuron seems to have more than one bit. Here, I think two particles which give information about distance. If the specific particle itself has information, it can have large information. It might explain the brain's large memory capacity.