{"id":3904,"date":"2024-01-21T21:46:54","date_gmt":"2024-01-21T12:46:54","guid":{"rendered":"http:\/\/tuat-chemphys.net\/?p=3904"},"modified":"2024-07-21T12:21:06","modified_gmt":"2024-07-21T03:21:06","slug":"%e5%85%89%e3%81%a8%e7%89%a9%e8%b3%aa%e3%81%ae%e5%bc%b7%e3%81%84%e7%9b%b8%e4%ba%92%e4%bd%9c%e7%94%a8%e3%82%92%e5%88%a9%e7%94%a8%e3%81%97%e3%81%9f%e3%82%b7%e3%83%aa%e3%82%b3%e3%83%b3%e5%9f%ba%e6%9d%bf","status":"publish","type":"post","link":"https:\/\/tuat-chemphys.net\/?p=3904","title":{"rendered":"\u30b7\u30ea\u30b3\u30f3\u3067\u5149\u52a0\u71b1\uff01\uff1f\uff1a\u30d7\u30e9\u30ba\u30e2\u30f3\u30c7\u30d0\u30a4\u30b9\u3078\u306e\u65b0\u3057\u3044\u30a2\u30d7\u30ed\u30fc\u30c1 How to heat up silicon with light: a new approach for plasmonic devices"},"content":{"rendered":"\n

\u5171\u632f\u5668\u3068\u4e00\u4f53\u5316\u3057\u305fSi\u30d7\u30e9\u30ba\u30e2\u30f3\u5c0e\u6ce2\u8def\u306b\u304a\u3051\u308b288K\u5c40\u6240\u5149\u71b1\u52a0\u71b1\u3068\u5c0f\u578b\u5316\u306e\u5b9a\u91cf\u5316 Quantification of 288 K local photothermal heating and miniaturization in Si plasmonic waveguides integrated with resonators (by Nana Ota, Kota Shinohara, Masahiko Hasumi and Hiromasa Shimizu)<\/strong> Japanese Journal of Applied Physics (2023) doi.org\/10.35848\/1347-4065\/acc917<\/a><\/p>\n\n\n\n

\u30b7\u30ea\u30b3\u30f3\u3067\u5149\u52a0\u71b1\uff01\uff1f\uff1a\u9769\u65b0\u7684\u306a\u30d7\u30e9\u30ba\u30e2\u30f3\u30c7\u30d0\u30a4\u30b9\u3078\u306e\u65b0\u3057\u3044\u30a2\u30d7\u30ed\u30fc\u30c1<\/h2>\n\n\n\n

\u30b7\u30ea\u30b3\u30f3\u306f\u5149\u6280\u8853\uff08\u30d5\u30a9\u30c8\u30cb\u30af\u30b9\uff09\u306e\u5206\u91ce\u3067\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u6750\u6599\u3067\u3059\u304c\u3001\u71b1\u3078\u306e\u5909\u63db\u52b9\u7387\u304c\u4f4e\u304f\u3001\u5149\u30b9\u30a4\u30c3\u30c1\u3084\u30c7\u30fc\u30bf\u8a18\u61b6\u3001\u30d0\u30a4\u30aa\u30bb\u30f3\u30b5\u30fc\u306e\u3088\u3046\u306a\u71b1\u3092\u5fc5\u8981\u3068\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3078\u306e\u6d3b\u7528\u304c\u5236\u9650\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u3067\u306f\u3001\u3053\u306e\u8ab2\u984c\u3092\u514b\u670d\u3057\u3001\u5149\u3067\u30b7\u30ea\u30b3\u30f3\u3092\u52b9\u7387\u7684\u306b\u52a0\u71b1\u3067\u304d\u308b\u30c7\u30d0\u30a4\u30b9\u3092\u4f5c\u308b\u3053\u3068\u306f\u3067\u304d\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n\n\n\n

\u6e05\u6c34\u7814\u7a76\u5ba4\u306f\u3001\u3053\u306e\u8ab2\u984c\u306b\u5bfe\u3057\u3066\u30b7\u30ea\u30b3\u30f3\u30d7\u30e9\u30ba\u30e2\u30f3\u6ce2\u5c0e\u52a0\u71b1\u5668\u3068\u30ea\u30f3\u30b0\u5171\u632f\u5668\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u65b0\u3057\u3044\u8a2d\u8a08\u306b\u3088\u308a\u89e3\u6c7a\u3057\u307e\u3057\u305f\u3002\u30d7\u30e9\u30ba\u30e2\u30f3\u6ce2\u5c0e\u306f\u3001\u91d1\u5c5e\u5c64\u306e\u96fb\u5b50\u96c6\u56e3\u632f\u52d5\u3068\u5149\u3092\u7d50\u3073\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u30ca\u30ce\u30b9\u30b1\u30fc\u30eb\u3067\u5149\u3092\u9589\u3058\u8fbc\u3081\u5c0e\u304f\u69cb\u9020\u3067\u3059\u3002\u30ea\u30f3\u30b0\u5171\u632f\u5668\u306f\u3001\u5c0e\u6ce2\u8def\u3092\u30eb\u30fc\u30d7\u72b6\u306b\u3057\u305f\u3082\u306e\u3067\u3001\u7279\u5b9a\u306e\u6ce2\u9577\u3067\u5171\u9cf4\u30e2\u30fc\u30c9\u3092\u4f5c\u308a\u51fa\u3057\u3001\u5149\u5f37\u5ea6\u3092\u5f37\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u7814\u7a76\u8005\u305f\u3061\u306f\u91d1\u5c5e\u5c64\u306b\u30b3\u30d0\u30eb\u30c8 (Co) \u3092\u4f7f\u7528\u3057\u3001\u30b7\u30ea\u30b3\u30f3\u5c0e\u6ce2\u8def\u3068\u30ea\u30f3\u30b0\u5171\u632f\u5668\u306b\u7d71\u5408\u3057\u307e\u3057\u305f\u3002\u5149\u3092\u5c0e\u6ce2\u8def\u52a0\u71b1\u5668\u306b\u5165\u5c04\u3059\u308b\u3068\u3001\u5149\u306e\u5f37\u5ea6\u304c\u9ad8\u307e\u308b\u306b\u3064\u308c\u3066\u5171\u9cf4\u6ce2\u9577\u304c\u9577\u3044\u6ce2\u9577\u5074\u306b\u30b7\u30d5\u30c8\u3059\u308b\u3053\u3068\u304c\u89b3\u5bdf\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u3001\u30b3\u30d0\u30eb\u30c8\u5c64\u304c\u5149\u3092\u5438\u53ce\u3057\u3066\u6e29\u5ea6\u304c\u4e0a\u6607\u3057\u305f\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002\u7814\u7a76\u8005\u305f\u3061\u306f\u3001\u71b1\u5149\u52b9\u679c\u306b\u57fa\u3065\u3044\u3066\u3053\u306e\u30b7\u30d5\u30c8\u3092\u89e3\u6790\u3057\u3001\u30b3\u30d0\u30eb\u30c8\u5c64\u306e\u5c40\u6240\u7684\u306a\u6e29\u5ea6\u4e0a\u6607\u3092\u5b9a\u91cf\u5316\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\u5165\u529b\u5149\u5f37\u5ea6\u304c 6.3 mW \u306e\u5834\u5408\u3001\u5c40\u6240\u7684\u306a\u6e29\u5ea6\u4e0a\u6607\u306f\u6700\u5927 288 K (15 \u00b0C) \u306b\u9054\u3057\u3001\u5149\u71b1\u5909\u63db\u52b9\u7387\u306f 46.1 K mW\u22121 \u3067\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u5024\u306f\u5f93\u6765\u306e\u30c7\u30d0\u30a4\u30b9\u3088\u308a\u3082\u9ad8\u304f\u3001\u65b0\u3057\u3044\u52a0\u71b1\u5668\u304c\u6539\u5584\u3055\u308c\u305f\u6027\u80fd\u3092\u6301\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u7814\u7a76\u8005\u305f\u3061\u306f\u3055\u3089\u306b\u3001\u5c40\u6240\u7684\u306a\u6e29\u5ea6\u4e0a\u6607\u3068\u5149\u71b1\u5909\u63db\u52b9\u7387\u306f\u3001\u30b7\u30ea\u30b3\u30f3\u9178\u5316\u7269 (SiO2) \u30d0\u30c3\u30d5\u30a1\u30fc\u5c64\u306e\u539a\u3055\u3068\u30ea\u30f3\u30b0\u5171\u632f\u5668\u306e\u534a\u5f84\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u3092\u767a\u898b\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u8981\u56e0\u306f\u3001\u4f1d\u64ad\u3059\u308b\u5149\u3068\u30b3\u30d0\u30eb\u30c8\u5c64\u3068\u306e\u76f8\u4e92\u4f5c\u7528\u306e\u5f37\u3055\u3068\u3001\u30ea\u30f3\u30b0\u5171\u632f\u5668\u5185\u90e8\u306e\u5149\u306e\u7b49\u4fa1\u5f37\u5ea6\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u3092\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\u7814\u7a76\u8005\u305f\u3061\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u69cb\u9020\u3092\u518d\u8a2d\u8a08\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5c0f\u578b\u30fb\u4f4e\u6d88\u8cbb\u96fb\u529b\u3067\u9ad8\u3044\u52b9\u7387\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8b70\u8ad6\u3057\u307e\u3057\u305f\u3002SiO2 \u30d0\u30c3\u30d5\u30a1\u30fc\u5c64\u3092\u8584\u304f\u3057\u3001\u30ea\u30f3\u30b0\u534a\u5f84\u3092\u5c0f\u3055\u304f\u3057\u3001\u30b3\u30d0\u30eb\u30c8\u5c64\u3092\u77ed\u304f\u3059\u308b\u3053\u3068\u3067\u52a0\u71b1\u6027\u80fd\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u63d0\u6848\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u5149\u640d\u5931\u304c\u4f4e\u3044\u91d1 (Au) \u3084\u9280 (Ag) \u306a\u3069\u4ed6\u306e\u91d1\u5c5e\u306e\u4f7f\u7528\u3082\u691c\u8a0e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u958b\u767a\u3055\u308c\u305f\u30d7\u30e9\u30ba\u30e2\u30f3\u6ce2\u5c0e\u52a0\u71b1\u5668\u306f\u3001\u30d5\u30a9\u30c8\u30cb\u30af\u30b9\u3001\u30ca\u30ce\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u3001\u30d0\u30a4\u30aa\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u306e\u3055\u307e\u3056\u307e\u306a\u5206\u91ce\u3067\u5fdc\u7528\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u6e29\u5ea6\u5909\u5316\u3067\u5149\u306e\u900f\u904e\u3092\u5236\u5fa1\u3059\u308b\u5c0f\u578b\u5149\u71b1\u30b9\u30a4\u30c3\u30c1\u3084\u3001\u5149\u3092\u5229\u7528\u3057\u3066\u6750\u6599\u3092\u52a0\u71b1\u78c1\u5316\u3059\u308b\u3053\u3068\u3067\u30c7\u30fc\u30bf\u3092\u8a18\u61b6\u3059\u308b\u30aa\u30f3\u30c1\u30c3\u30d7\u78c1\u6c17\u5149\u8a18\u9332 (MO) \u3084\u71b1\u88dc\u52a9\u78c1\u6c17\u8a18\u9332 (HAMR) \u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u96fb\u6d41\u306a\u3057\u3067\u52a0\u71b1\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u30d7\u30e9\u30ba\u30e2\u30f3\u5149\u30bb\u30f3\u30b5\u30fc\u3078\u306e\u5438\u7740\u5206\u5b50\u306e\u8131\u7740\u3001DNA\u306e\u71b1\u6cf3\u52d5\u64cd\u4f5c\u3001\u30e9\u30dc\u30aa\u30f3\u30c1\u30c3\u30d7\u65b9\u5f0f\u3067\u306e\u30dd\u30ea\u30e1\u30e9\u30fc\u30bc\u9023\u9396\u53cd\u5fdc\u306b\u3088\u308b\u907a\u4f1d\u5b50\u8907\u88fd\u306a\u3069\u3082\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n

\n
\"\"
Schematic images showing (a) a cross-sectional image of a Si plasmonic waveguide heater with (b) a ring resonator. (a)Si\u30d7\u30e9\u30ba\u30e2\u30cb\u30c3\u30af\u5c0e\u6ce2\u7ba1\u30d2\u30fc\u30bf\u30fc\u3068(b)\u30ea\u30f3\u30b0\u5171\u632f\u5668\u306e\u65ad\u9762\u56f3\u3002<\/figcaption><\/figure>\n<\/div>\n\n
\n
\"\"
(a) A cross-sectional SEM image of a plasmonic waveguide heater. (b) An optical microscope image of the Si plasmonic waveguide heater with the Si ring resonator. (a\uff09\u30d7\u30e9\u30ba\u30e2\u30cb\u30c3\u30af\u5c0e\u6ce2\u8def\u30d2\u30fc\u30bf\u30fc\u306e\u65ad\u9762SEM\u50cf\u3002(b\uff09Si\u30ea\u30f3\u30b0\u5171\u632f\u5668\u3092\u5099\u3048\u305fSi\u30d7\u30e9\u30ba\u30e2\u30f3\u5c0e\u6ce2\u8def\u30d2\u30fc\u30bf\u30fc\u306e\u5149\u5b66\u9855\u5fae\u93e1\u50cf\u3002<\/figcaption><\/figure>\n<\/div>\n\n\n

How to heat up silicon with light: a new approach for plasmonic devices<\/strong><\/p>\n\n\n\n

Silicon is a widely used material for photonics, the science and technology of light. However, silicon has a limitation: it cannot efficiently convert light into heat, which is needed for some applications such as optical switches, data storage, and biosensors. How can we overcome this challenge and create devices that can heat up silicon with light?<\/p>\n\n\n\n

Shimizu Research Group has found a solution: they designed and fabricated silicon plasmonic waveguide heaters with ring resonators. Plasmonic waveguides are structures that can confine and guide light at the nanoscale, by coupling it with the collective oscillations of electrons in a metal layer. Ring resonators are loops of waveguides that can enhance the light intensity and create resonant modes with specific wavelengths.<\/p>\n\n\n\n

The researchers used cobalt (Co) as the metal layer, and integrated it with silicon waveguides and ring resonators. They injected transverse magnetic ™ mode light into the waveguide heaters, and observed that the resonance wavelength shifted toward a longer wavelength as the light intensity increased. This shift indicated that the temperature of the Co layer rose due to the absorption of light. By analyzing the shift based on the thermo-optic effect, the researchers quantified the local temperature rise at the Co layer.<\/p>\n\n\n\n

They found that the local temperature rise was as high as 288 K (15 \u00b0C) when the input power was 6.3 mW, and the photothermal conversion efficiency was 46.1 K mW\u22121. These values were higher than those of previous devices, showing that the plasmonic waveguide heaters had improved characteristics. The researchers also found that the local temperature rise and the photothermal conversion efficiency depended on the thickness of the silicon dioxide (SiO2) buffer layer, and the radius of the ring resonator. They explained that these factors affected the strength of the interaction between the propagating light and the Co layer, and the equivalent light intensity inside the ring resonator.<\/p>\n\n\n\n

The researchers discussed how to achieve a higher efficiency with a smaller size and a lower input power, by redesigning the device structure. They suggested that using a thinner SiO2 buffer layer, a smaller ring radius, and a shorter Co layer could enhance the heating performance. They also proposed to use other metals such as gold (Au) or silver (Ag), which have lower optical losses than Co.<\/p>\n\n\n\n

The plasmonic waveguide heaters developed by the researchers could have various applications in the fields of photonics, nanotechnology, and biotechnology. For example, they could be used for compact photothermal switches, which can control the transmission of light by changing the temperature. They could also be used for on-chip magneto-optical (MO) recording or heat-assisted magnetic recording (HAMR), which can store data by using light to heat up and magnetize a material. Moreover, they could be used for heating without electric current, which could enable the desorption of adsorbed molecules in plasmonic optical sensors, the thermophoretic manipulation of DNA, and the gene replication by polymerase chain reaction with the lab-on-a-chip scheme.<\/p>\n\n\n\n

<\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

\u3053\u306e\u7a2e\u306e\u30d2\u30fc\u30bf\u30fc\u306f\uff0c\u5149\u3092\u71b1\u306b\u5909\u63db\u3059\u308b\u52b9\u7387\u304c\u975e\u5e38\u306b\u9ad8\u304f\uff0c\u5f93\u6765\u306e\u8a2d\u8a08\u3088\u308a\u3082\u512a\u308c\u3066\u3044\u308b\u3053\u3068\u3082\u5206\u304b\u3063\u305f\uff0ethis kind of heater is very good at turning light into heat, much better than previous designs. 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