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Your search keyword '"Miyazaki, H."' showing total 10 results
Start Over Author "Miyazaki, H." Journal applied physics letters
10 results on '"Miyazaki, H."'

9. Dual-band infrared metasurface thermal emitter for CO2 sensing.

Author

Miyazaki, H. T., Kasaya, T., Iwanaga, M., Choi, B., Sugimoto, Y., and Sakoda, K.

Subjects
*CARBON dioxide detectors, *INFRARED equipment, *OPTICAL polarization, *BLACKBODY radiation, *ELECTRIC properties of silicon nitride, *ELECTROMAGNETIC fields
Abstract

Polarization- and angle-independent, dual-band metasurface thermal emitter was developed. The metasurface emits radiation at 4.26 μm and 3.95 μm, conventionally used for CO2 sensing. The metasurface is based on a planar Au/Al2O3/Au structure, in which orthogonal rectangular Au patches are arrayed alternately, and generates nearly perfect blackbody radiation with an emittance as high as 0.97. The metasurface is integrated on a resistive heater mounted on a SiN membrane, so that the infrared waves are produced by applying a voltage. The metasurface emitter was incorporated into an actual CO2 sensing system and was demonstrated to reduce the electric power needed by about 30% compared with a conventional blackbody emitter by suppressing unnecessary radiation. [ABSTRACT FROM AUTHOR]

Published
2014
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10. Opal-like photonic crystal with diamond lattice.

Author

Garcı´a-Santamarı´a, F., Lo´pez, C., Meseguer, F., Lo´pez-Tejeira, F., Sa´nchez-Dehesa, J., and Miyazaki, H. T.

Subjects
DIAMOND crystals, PHOTONICS, NEAR infrared spectroscopy
Abstract

A method to fabricate a diamond structure with a complete photonic bandgap in the near infrared is proposed. The procedure starts by building an opal with body-centered-cubic symmetry composed of two types (organic and inorganic) of microspheres by means of a microrobotic technique. Then, the organic particles may be selectively removed to obtain a diamond structure of inorganic particles. This method can be extended to make diamond inverse opals of silicon with full gap to midgap ratios as large as 13% for moderate filling fractions. © 2001 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2001

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