2005 Fiscal Year Final Research Report Summary
Spectrally selective coherent thermal radiation by near-field optical effects
| Project/Area Number |
15206021
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
YUGAMI Hiroo Tohoku University, Graduate School of Engineering, Professor, 大学院工学研究科, 教授 (60192803)
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| Co-Investigator(Kenkyū-buntansha) |
SATA Noriko Tohoku University, Graduate School of Engineering, Associate Professor, 大学院工学研究科, 助教授 (20271984)
ONO Takahito Tohoku University, Graduate School of Engineering, Associate Professor, 大学院工学研究科, 助教授 (90282095)
KANAMORI Yoshiaki Tohoku University, Graduate School of Engineering, Research Associate, 大学院工学研究科, 助手 (10333858)
MARUYAMA Shigenao Tohoku University, Institute of Fluid Science, Professor, 流体科学研究所, 教授 (80173962)
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| Project Period (FY) |
2003 – 2005
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| Keywords | Near field optics / Photonic crystal / Diffractive grating / Thermal emission / Thermophotovoltaic power generation / Nanotechnology / SNOM |
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| Research Abstract |
In this study, a near-field thermal radiation analyzing system was developed in order to study the spectral properties of near-field thermal radiation. Using the apparatus we succeeded in a measurement of near-field thermal radiation spectra. The knowledge provided through this study is as follows ;
1.The super-high-vacuum type STM/SNOM system operated at high temperature was developed in this study. By changing distance between the probe and sample surface the optical signal was drastically changed at 800K. From this result it was confirmed that the near-field thermal radiation was detected by the STM/SNOM system.
2.The distance dependence of thermal radiation intensity from metal (W) surface was estimated by changing the amplitude of tip-modulation. From this study, it was revealed that the near-field thermal radiation was localized at about 6nm range from the surface.
3.The thermal radiation spectra from three different samples with different cavity depth were explained by the cavity-effect and surface plasmon-polariton mechanism.
4.It was found that the intensity of near-field thermal radiation from the normalized area will be ten to hundred times stronger than that of far-field thermal radiation.
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