Microspherical upconversion laser for near field microscopy

用于近场显微镜的微球形上转换激光器

• 批准号: 11555009
• 负责人: SASAKI Keiji
• 金额: $ 8.38万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555009/
• 关键词: Microspherical laser; Upconversion emission; Multiphoton excitation; Rare earth ions; Near field microscopy; Laser manipulation; アップコンバージョン-発光; レーザーマンピュレーション

We have originally prepared rare-earth ion-dope glass micropheres, and succeeded in inducing microspherical laser oscillation in visible and ultraviolet wavelength regions, which was based on multiphoton excitation with near-infrared light. These microspherical lasers have unique characteristics: (1) extremely stable lasing in the long time range, compared with organic dye doped polymer microspheres, (2) easiness in separation between pumping and emission light, because of wide wavelength difference due to upconversion processes, and (3) noncontact and nondestructive manipulation of the lasing microspheres with a near infrared laser, which can be simultaneously used for pumping. In this research, we have analyzed upconversion emission dynamics by use of three-dimensional space-resolved and picosecond time-resolved spectroscopy system we originally developed. Then, we designed the rare-ions and glass materials suitable for microspherical lasers, and developed a new technique for forming tens of micrometers sized spheres with smooth surfaces. We have succeeded in obtaining not only blue and red upconvesion emissions but also green lasing emission that is useful for biological applications. We have analyzed various properties of these glass microspherical lasing and discussed on the applicability to a probe of near field microscopy.

我们首次制备了稀土离子掺杂玻璃微球，并基于近红外光的多光子激发，成功地诱导了可见光和紫外光波段的微球激光振荡。这些微球激光器具有独特的特点：(1)与有机染料掺杂聚合物微球相比，激光在长时间范围内非常稳定；(2)由于上转换过程的波长差异较大，易于分离泵浦和发射光；(3)近红外激光对激光微球进行非接触和无损操作，可同时用于泵浦。在这项研究中，我们利用自己开发的三维空间分辨和皮秒时间分辨光谱系统分析了上转换发射动力学。然后，我们设计了适用于微球激光器的稀土离子和玻璃材料，并开发了一种新的技术来形成几十微米大小的光滑表面的球体。我们不仅成功地获得了蓝光和红光上传发射，而且还获得了对生物应用有用的绿色激光发射。我们分析了这些玻璃微球激光的各种特性，并讨论了它们对近场显微镜探头的适用性。

项目成果

K. Sasaki: "Date Processing for Scientific Optical Measurement(Chaps. 4 and 9)"CQ Publishing. total page 223 (2002)

K. Sasaki：“科学光学测量的数据处理（第 4 章和第 9 章）”CQ 出版社。

Hideki Fujiwara: "Lasing of a Microsphere in Dye Solution"Japan Journal of Applied Physics. 38. 5101-5104 (1999)

藤原秀树：“染料溶液中微球的激光”日本应用物理学杂志。

笹木 敬司: "科学計測のためのデータ処理入門(第4章・第9章)"CQ出版社. 223 (2002)

Keiji Sasaki：“科学测量数据处理简介（第 4 章和第 9 章）”CQ Publishing 223（2002）。

Y.Matsuo: "Absorption analysis of a single microparticle by optical forcemeasurement"Journal of Applied Physics. 印刷中. (2001)

Y.Matsuo：“通过光学力测量对单个微粒进行吸收分析”应用物理学杂志（2001 年）。

笹木敬司: "新しいフォトニクス時代の材料とデバイス"ティー・アイ・シー. 412 (2000)

Keiji Sasaki：“新光子学时代的材料和器件”TIC 412 (2000)。