Abstract
The spectral absorption properties of ultrananocrystalline diamond (UNCD)/amorphous carbon composite films grown by pulsed laser deposition with graphite were experimentally investigated. The indirect optical band gaps estimated from the absorption spectrum were 1.0 eV and approximately 5.65 eV, which correspond to those for the amorphous carbon surrounding the UNCDs and for UNCDs themselves, respectively. In addition, the spectrum revealed a direct gap having a value of approximately 2.2 eV. One probable origin can be the presence of grain boundaries between UNCDs and amorphous carbon since they are specific to UNCD/amorphous carbon; further, its appearance is consistent with the theoretical predictions.
| Original language | English |
|---|---|
| Journal | Japanese Journal of Applied Physics, Part 2: Letters |
| Volume | 46 |
| Issue number | 36-40 |
| DOIs | |
| Publication status | Published - Oct 12 2007 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)
Cite this
Spectral absorption properties of ultrananocrystalline diamond/amorphous carbon composite thin films prepared by pulsed laser deposition. / Yoshitake, Tsuyoshi; Nagano, Akira; Itakura, Masaru; Kuwano, Noriyuki; Hara, Takeshi; Nagayama, Kunihito.
In: Japanese Journal of Applied Physics, Part 2: Letters, Vol. 46, No. 36-40, 12.10.2007.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Spectral absorption properties of ultrananocrystalline diamond/amorphous carbon composite thin films prepared by pulsed laser deposition
AU - Yoshitake, Tsuyoshi
AU - Nagano, Akira
AU - Itakura, Masaru
AU - Kuwano, Noriyuki
AU - Hara, Takeshi
AU - Nagayama, Kunihito
PY - 2007/10/12
Y1 - 2007/10/12
N2 - The spectral absorption properties of ultrananocrystalline diamond (UNCD)/amorphous carbon composite films grown by pulsed laser deposition with graphite were experimentally investigated. The indirect optical band gaps estimated from the absorption spectrum were 1.0 eV and approximately 5.65 eV, which correspond to those for the amorphous carbon surrounding the UNCDs and for UNCDs themselves, respectively. In addition, the spectrum revealed a direct gap having a value of approximately 2.2 eV. One probable origin can be the presence of grain boundaries between UNCDs and amorphous carbon since they are specific to UNCD/amorphous carbon; further, its appearance is consistent with the theoretical predictions.
AB - The spectral absorption properties of ultrananocrystalline diamond (UNCD)/amorphous carbon composite films grown by pulsed laser deposition with graphite were experimentally investigated. The indirect optical band gaps estimated from the absorption spectrum were 1.0 eV and approximately 5.65 eV, which correspond to those for the amorphous carbon surrounding the UNCDs and for UNCDs themselves, respectively. In addition, the spectrum revealed a direct gap having a value of approximately 2.2 eV. One probable origin can be the presence of grain boundaries between UNCDs and amorphous carbon since they are specific to UNCD/amorphous carbon; further, its appearance is consistent with the theoretical predictions.
UR - http://www.scopus.com/inward/record.url?scp=36048972555&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=36048972555&partnerID=8YFLogxK
U2 - 10.1143/JJAP.46.L936
DO - 10.1143/JJAP.46.L936
M3 - Article
AN - SCOPUS:36048972555
VL - 46
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 36-40
ER -