Research on the precipitation of quantum-size particles from Ag_2O-doped glasses

Ag_2O掺杂玻璃中量子尺寸粒子的沉淀研究

• 批准号: 06452316
• 负责人: SHIBATA Shuichi
• 金额: $ 5.06万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452316/
• 关键词: Quantum-size metal particles; Nonlinear optical effect; Ion irradiation; Ag_2O-doped glasses; 非線形効果

Glasses containing quantum-size metal particles can exibit a large nonlinear optical susceptibility, X^<(3)>, with ultra fast speed of nsec - psec. They are currently at the forefront reseaech for photonic switches in optical communication and optical computing. This research has been dedicated to prepare high-content Ag_2O-doped glass substrates and subsequently demonstrate precipitation of quantum-size particles by ion irradiation of 10-20keV ion energy.Because of good chemical durability and easy Ag ion doping, P_2O_5-Al_2O_3-Ag_2O(Ag_2O=10-20 mol %) were chosen as glass substrate materials. Ion irradiation such as N_2^+, Ar^+ with relatively low energy can precipitate high concentration of the quantum-sized Ag particles near the glass surface. Their sizes were estimated directly by FE-SEM,and from the data of the intensity and shape of the plasma absorption peak at the wavelength of 420 nm.To measure the X^<(3)> value, the Ag particle concentration should increase. Thus, appropriate glass composition was searched : P_2O_5-Al_2O_3-Ag_2O (15-20mol %) -Na_2O (15-20mol %) glasses were successfully found and resulted in the two times concentration as large as that of non-Na_2O glasses. At 450 nm wavelength, by degenerate four-wave mixing (DFWM) with a short pulsu laser, X^<(3)> of 5.5-8.8*10^<-7> esu was estimated from these samples. Precise control of particle size by the technique is in progress.

含有量子尺寸金属颗粒的玻璃可以表现出大的非线性光学磁化率X^<(3)>，具有纳秒-皮秒的超快速度。他们目前处于光通信和光计算领域光子开关研究的前沿。本研究致力于制备高含量Ag_2O掺杂玻璃基板，并随后通过10-20keV离子能量的离子辐照证明了量子尺寸粒子的沉淀。由于良好的化学耐久性和易于Ag离子掺杂，P_2O_5-Al_2O_3-Ag_2O选择(Ag_2O=10-20mol%)作为玻璃基板材料。能量较低的N_2^+、Ar^+等离子辐照可以在玻璃表面附近析出高浓度的量子尺寸的Ag颗粒。它们的尺寸直接通过FE-SEM估计，并根据420 nm波长处等离子体吸收峰的强度和形状的数据。为了测量X^<(3)>值，Ag颗粒的浓度应该增加。因此，寻找合适的玻璃组成：成功地找到了P_2O_5-Al_2O_3-Ag_2O(15-20mol%)-Na_2O(15-20mol%)玻璃，其浓度是非Na_2O玻璃的两倍。在450nm波长处，通过使用短脉冲激光的简并四波混频(DFWM)，从这些样本估计5.5-8.8*10^-7esu的X^(3)>。通过该技术精确控制颗粒尺寸正在进行中。

项目成果

N.Kitazawa,T.Yano,S.Shibata and M.Yamane: "Effect of Na_2O addition to Ag_2O-Doped Phosphate Glasses on Enhancement of Silver Precipitation by Low-Energy lon lrradiation" Jpn.J.Appl.Phys.vol35 4A. (1996)

N.Kitazawa、T.Yano、S.Shibata 和 M.Yamane：“Ag_2O 掺杂磷酸盐玻璃中添加 Na_2O 对低能辐射增强银沉淀的影响”Jpn.J.Appl.Phys.vol35 4A。

N. Kitazawa, T. Yano, S. Shibata and M. Yamane: "Effect of Na_2O addition to Ag_2O-Doped Phosphate Glasses on Enhancement of Silver Precipitation by Low-Energy Ion Irradiation" Jpn. J. Appl. Phys.vol35 4A. (1966)

N. Kitazawa、T. Yano、S. Shibata 和 M. Yamane：“Ag_2O 掺杂磷酸盐玻璃中添加 Na_2O 对低能离子照射增强银沉淀的影响”Jpn。

N. Kitazawa: "Precipitation of Silver Particles in Glasses by Ion Irradiation" Jpn. J. Appl. Phys.33. L1245-L1247 (1994)

N. Kitazawa：“通过离子照射使玻璃中的银颗粒沉淀”Jpn。

N.Kitazawa,T.Yano,S.Shibata and M.Yamane: "Precipitation of Silver Particles in Glasses by lon lrradaition" Jpn.J.Appl.Phys.33,. L1245-L1247 (1994)

N.Kitazawa、T.Yano、S.Shibata 和 M.Yamane：“通过长距离照射玻璃中银颗粒的沉淀”Jpn.J.Appl.Phys.33，。

N.Kitazawa, T.Yano, S.Shibata and M.Yamane: "Effect of Na_2O addition to Ag_2O-Doped Phosphate Glasses on Enhancement of Silver Precipitation by Low-Energy Ion Irradiation" Jpn.J.Appl.Phys.vol 35 4A. (1996)

N.Kitazawa、T.Yano、S.Shibata 和 M.Yamane：“Ag_2O 掺杂磷酸盐玻璃中添加 Na_2O 对低能离子辐照银沉淀增强效果” Jpn.J.Appl.Phys.vol 35 4A