Crossref journal-article
American Association for the Advancement of Science (AAAS)
Science (221)
Abstract

Inhibiting spontaneous light emission and redistributing the energy into useful forms are desirable objectives for advances in various fields, including photonics, illuminations, displays, solar cells, and even quantum-information systems. We demonstrate both the “inhibition” and “redistribution” of spontaneous light emission by using two-dimensional (2D) photonic crystals, in which the refractive index is changed two-dimensionally. The overall spontaneous emission rate is found to be reduced by a factor of 5 as a result of the 2D photonic bandgap effect. Simultaneously, the light energy is redistributed from the 2D plane to the direction normal to the photonic crystal.

Bibliography

Fujita, M., Takahashi, S., Tanaka, Y., Asano, T., & Noda, S. (2005). Simultaneous Inhibition and Redistribution of Spontaneous Light Emission in Photonic Crystals. Science, 308(5726), 1296–1298.

Authors 5
  1. Masayuki Fujita (first)
  2. Shigeki Takahashi (additional)
  3. Yoshinori Tanaka (additional)
  4. Takashi Asano (additional)
  5. Susumu Noda (additional)
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  27. The PBG region is identified as follows. At the edges of the PBG (the upper and lower boundaries of the PBG region) the group velocity of light approaches zero and waves propagating in different directions in the slab couple in a type of 2D cavity resonator resulting in standing-wave formation. Under sufficiently strong excitation above the population-inversion threshold a resonant peak is observed at the photonic band edge as a result of stimulated emission. In these experiments we used an excitation intensity of 10 W/cm 2 which is 20 times as high as that used in the spontaneous emission-lifetime measurement to obtain such a population inversion. In this way we detected resonant peaks corresponding to the photonic band edges over a broad wavelength range. It was possible to fit the relation between the band-edge wavelength and the photonic-crystal period using a linear function obtaining λ S = 2.28 a + 350 (nm) for the shorter wavelength band edge and λ L = 2.90 a + 357 (nm) for the longer wavelength band edge. These results are consistent with the 3D FDTD photonic band-diagram calculation.
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  31. This work was partly supported by a Grant-in-Aid (no. 15GS0209) and an IT project grant from the Ministry of Education Culture Sports Science and Technology of Japan and by the Japan Science and Technology Corporation (CREST). M.F. was supported by a Research Fellowship of the Japan Society for the Promotion of Science (no. 15004417).
Dates
Type When
Created 20 years, 2 months ago (May 26, 2005, 4:44 p.m.)
Deposited 1 year, 7 months ago (Jan. 9, 2024, 11:25 p.m.)
Indexed 2 weeks, 2 days ago (Aug. 6, 2025, 9:48 a.m.)
Issued 20 years, 2 months ago (May 27, 2005)
Published 20 years, 2 months ago (May 27, 2005)
Published Print 20 years, 2 months ago (May 27, 2005)
Funders 0

None

@article{Fujita_2005, title={Simultaneous Inhibition and Redistribution of Spontaneous Light Emission in Photonic Crystals}, volume={308}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1110417}, DOI={10.1126/science.1110417}, number={5726}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Fujita, Masayuki and Takahashi, Shigeki and Tanaka, Yoshinori and Asano, Takashi and Noda, Susumu}, year={2005}, month=may, pages={1296–1298} }