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المؤلفون: Shibata, Hiroyuki, Kirigane, Naoto, Fukao, Kentaro, Sakai, Daisuke, Karimoto, Shinichi, Yamamoto, Hideki
الوصف: We report the fabrication and photoresponse of 5nm thick La1.85Sr0.15CuO4 nanostrip with a width of 100nm. The I-V characteristics of the nanostrip show a hysteresis and a sharp voltage jump at Ic. The Jc(3K) of the nanostrip is 2.3 × 107 A/cm2. The nanostrip exhibits photoresponse signals when illuminated by a pulse laser at 1560 nm wavelength with a bias current just below Ic. The height of the signal reduces as the optical intensity decreases and disappears below -10 dBm. The signal also decreases as the temperature increases, but it exists up to 30 K. These results suggest the possibility of La1.85Sr0.15CuO4 nanostrip as single-photon detector (SSPD, SNSPD) working at high temperature by further reducing the cross-section of the strip. ; journal article
وصف الملف: application/pdf
العلاقة: https://doi.org/10.1088/1361-6668/aa6c3eTest; Superconductor Science and Technology; 30; 074001; https://kitami-it.repo.nii.ac.jp/record/8682/files/PhotoresponseTest of La1.85Sr0.15CuO4 nanostrip.pdf
الإتاحة: https://doi.org/10.1088/1361-6668/aa6c3eTest
https://kitami-it.repo.nii.ac.jp/record/8682/files/PhotoresponseTest of La1.85Sr0.15CuO4 nanostrip.pdf -
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المؤلفون: Harada, Kenji, Yamaguchi, Takenobu, Tsuchida, Tomohiro, Sakai, Daisuke
الوصف: Visual cryptography is known as a method of sharing a secret image through several encrypted images. Conventional visual cryptography can display only monochrome images. We develop a multicolor visual encryption technique using the interference color of high-order retarder films. The encrypted films are composed of a polarizing film and retarder films. Retarder films exhibit an interference color upon sandwiching between two polarizing films. A prototype of a visual cryptography device using interference color is developed. Eight colors are represented by combining an encrypted image and a decoding mask composed of retarder films with various retardations. ; journal article
وصف الملف: application/pdf
العلاقة: Japanese Journal of Applied Physics; 6R; 52; https://kitami-it.repo.nii.ac.jp/record/8264/files/14Test著者版.pdf
الإتاحة: https://kitami-it.repo.nii.ac.jp/record/8264/files/14Test著者版.pdf
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المؤلفون: Ikeda, Hiroshi, Sakai, Daisuke, Funatsu, Shiro, Yamamoto, Kiyoshi, Suzuki, Toshio, Harada, Kenji, Nishii, Junji
الوصف: Formation mechanisms of alkali-free and high-proton concentration surfaces were investigated for a soda lime glass using a corona discharge treatment under an atmospheric pressure. Protons produced by high DC voltage around an anode needle electrode were incorporated into a sodium ion site in the anode side glass. The sodium ion was swept away to the cathode side as a charge carrier. Then it was discharged. The precipitated sodium was transformed to a Na 2CO3 powder when the surface contacted with air. The sodium ion in the glass surface layer of the anode side was replaced completely by protons. The concentration of OH groups in the layer was balanced with the amount of excluded sodium ions. The substitution reaction of sodium ions with protons tends to be saturated according to a square root function of time. The alkali depletion layer formation rate was affected by the large difference in mobility between sodium ions and protons in the glass. ; journal article
وصف الملف: application/pdf
العلاقة: https://doi.org/10.1063/1.4817760Test; Journal of Applied Physics; 063303; 114; https://kitami-it.repo.nii.ac.jp/record/8259/filesTest/３出版社版.pdf
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المؤلفون: Ikutame, Naoki, Kawaguchi, Keiga, Ikeda, Hiroshi, Sakai, Daisuke, Harada, Kenji, Funatsu, Shiro, Nishii, Junji
الوصف: Periodic structures were imprinted on a soda lime glass surface below its glass transition temperature (T g) using a carbon-coated SiO2 mold under application of DC voltage. The structure height increased with the applied DC voltage, although no significant increase with pressure was found. At a temperature around T g, the height reached saturation. Chemical etching using 55% KOH solution at 70?°C increased the structure height to eight times the height before etching. Noticeable alternating depression patterns and rapid chemical etching are closely related with the selective decrease in sodium concentration, which occurred only in the surface areas that were pressurized by the mold. ; journal article
وصف الملف: application/pdf
العلاقة: https://doi.org/10.1063/1.4819321Test; J. Appl. Phys.; 083514; 114; https://kitami-it.repo.nii.ac.jp/record/8258/filesTest/２出版社版.pdf
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المؤلفون: Sakai, Daisuke, Harada, Kenji, Kamemaru, Shun-ichi, Fukuda, Takashi
الوصف: The authors propose a technique of recording in glass plates using corona charging. The recording material used in this study is conventional soda-lime glass. A surface-relief hologram on an azobenzene polymer film coated on a glass plate can be recorded as an electric charge distribution in the glass plate using corona charging. The hologram recorded in the glass plate can be reconstructed as a surface-relief structure on a fresh azobenzene polymer film coated on the glass plate, again using corona charging. ; (c)2007 American Institute of Physics ; application/pdf ; journal article
وصف الملف: application/pdf
العلاقة: http://doi.org/10.1063/1.2459675Test; Applied physics letters; 90; 061102-1; 061102-3; https://kitami-it.repo.nii.ac.jp/record/7255/files/apl_90_2007.pdfTest
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المؤلفون: Sugawara, Shiori, Harada, Kenji, Sakai, Daisuke
مصطلحات موضوعية: Visual cryptography, Information security, Interference color, Retarder film
الوصف: Visual cryptography can be used as a method of sharing a secret image through several encrypted images. Conventional visual cryptography can display only monochrome images. We have developed a high-chroma color visual encryption technique using the interference color of high-order retarder films. The encrypted films are composed of a polarizing film and retarder films. The retarder films exhibit interference color when they are sandwiched between two polarizing films. We propose a stacking technique for displaying high-chroma interference color images. A prototype visual cryptography device using high-chroma interference color is developed. ; journal article
وصف الملف: application/pdf
العلاقة: http://doi.org/10.1007/s10043-015-0095-4Test; Optical Review; 22; 544; 552; https://kitami-it.repo.nii.ac.jp/record/8263/files/12Test著者版.pdf
