- 著者
- Min Eun Jung Shin Jun Geun Lee Jae Hwi Yasuno Yoshiaki Lee Byeong Ha
- 出版者
- Optical Society of America
- 雑誌
- Optics letters (ISSN:01469592)
- 巻号頁・発行日
- vol.37, no.15, pp.3105-3107, 2012-08
- 被引用文献数
- 7
We present a full range handheld probe type spectral domain optical coherence tomography (SD-OCT) method. Here, the sample arm is composed of a tilted fiber-optic cantilever scanner; thus, the phase shift concurrently occurs while sample scanning. With the phase shift, we could achieve a full range complex-conjugate-free OCT image with no additional phase shifters in the reference arm. To realize this technique, a magnetically actuated probe was adopted. Full range SD-OCT images of a pearl, human fingernail, and human tooth were subsequently obtained using this suggested probe. The scanning range and acquisition speed were 3 mm and 20 frames/s, respectively.
- 著者
- Namura Kyoko Suzuki Motofumi Nakajima Kaoru Kimura Kenji
- 出版者
- Optical Society of America
- 雑誌
- Optics Letters (ISSN:01469592)
- 巻号頁・発行日
- vol.36, no.18, pp.3533-3535, 2011-09-15
- 被引用文献数
- 9
We have investigated the heat generation from gold nanoparticles resulting from their local plasma resonance. We have demonstrated the self-assembly of Au nanoparticle arrays/dielectric layer/Ag mirror sandwiches, i.e., a local plasmon resonator, using a dynamic oblique deposition technique. The thicknesses of the Au and dielectric layers were changed combinatorially on a single substrate. As a result, local plasmon resonator chips were successfully fabricated. Because of strong interference, their optical absorption can be controlled between 0.0% and 97% in the near-IR region, depending on the thickness of the dielectric layer. We evaluated the heat generation from Au nanoparticles by measuring the temperature of water with which a cell prepared on a chip is filled under laser illumination. The change in the water temperature is proportional to the optical absorption of the local plasmon resonator chips. This suggests that the photothermal conversion efficiency can be controlled by interference. These features make the application of the local plasmon resonator to nanoheaters, which can spatiotemporally control heat generation, suitable.