Non-linear increases in excitonic emission in synthetic type-IIa diamond

Kazushi Nakazawa; Hitoshi Umezawa; Minoru Tachiki; Hiroshi Kawarada

doi:10.1016/S0925-9635(03)00194-8

Non-linear increases in excitonic emission in synthetic type-IIa diamond

Kazushi Nakazawa, Hitoshi Umezawa, Minoru Tachiki, Hiroshi Kawarada^*

^*この研究の対応する著者

基幹理工学部

研究成果 › 査読

3 被引用数 (Scopus)

抄録

Free-exciton emissions increase non-linearly by cathodoluminescence (CL) above the threshold probe current of 30 μA in high-pressure high-temperature synthetic type-IIa diamond. A droplet of electron-hole liquid (EHL) is also observed by CL for the first time. Furthermore, boron acceptor bound-exciton emission as well as free-exciton emission also increases super-linearly in an unintentionally boron-contaminated area. The threshold probe current of non-linear increase of excitonic emission is in accordance with the emergence of the EHL peak. It is considered that the non-linear increase of excitonic emissions is due to the increase in the radiative recombination rate of free excitons under high exciton density.

本文言語	English
ページ（範囲）	1995-1998
ページ数	4
ジャーナル	Diamond and Related Materials
巻	12
号	10-11
DOI	https://doi.org/10.1016/S0925-9635(03)00194-8
出版ステータス	Published - 2003

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
化学 (全般)
機械工学
材料化学
電子工学および電気工学

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10.1016/S0925-9635(03)00194-8

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@article{a119dacb0bca4997bb2e334a30e6d0d7,

title = "Non-linear increases in excitonic emission in synthetic type-IIa diamond",

abstract = "Free-exciton emissions increase non-linearly by cathodoluminescence (CL) above the threshold probe current of 30 μA in high-pressure high-temperature synthetic type-IIa diamond. A droplet of electron-hole liquid (EHL) is also observed by CL for the first time. Furthermore, boron acceptor bound-exciton emission as well as free-exciton emission also increases super-linearly in an unintentionally boron-contaminated area. The threshold probe current of non-linear increase of excitonic emission is in accordance with the emergence of the EHL peak. It is considered that the non-linear increase of excitonic emissions is due to the increase in the radiative recombination rate of free excitons under high exciton density.",

keywords = "Cathodoluminescence, Electron-hole liquid, Free exciton, High-pressure high-temperature type-IIa diamond, Non-linear increase",

author = "Kazushi Nakazawa and Hitoshi Umezawa and Minoru Tachiki and Hiroshi Kawarada",

note = "Funding Information: This work is supported in part by a Grant-in-Aid for the Center of Excellence (COE) Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan. This work is also partially supported by the Advanced Research Institute for Science and Engineering, Waseda University.",

year = "2003",

doi = "10.1016/S0925-9635(03)00194-8",

language = "English",

volume = "12",

pages = "1995--1998",

journal = "Diamond and Related Materials",

issn = "0925-9635",

publisher = "Elsevier BV",

number = "10-11",

}

TY - JOUR

T1 - Non-linear increases in excitonic emission in synthetic type-IIa diamond

AU - Nakazawa, Kazushi

AU - Umezawa, Hitoshi

AU - Tachiki, Minoru

AU - Kawarada, Hiroshi

N1 - Funding Information: This work is supported in part by a Grant-in-Aid for the Center of Excellence (COE) Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan. This work is also partially supported by the Advanced Research Institute for Science and Engineering, Waseda University.

PY - 2003

Y1 - 2003

N2 - Free-exciton emissions increase non-linearly by cathodoluminescence (CL) above the threshold probe current of 30 μA in high-pressure high-temperature synthetic type-IIa diamond. A droplet of electron-hole liquid (EHL) is also observed by CL for the first time. Furthermore, boron acceptor bound-exciton emission as well as free-exciton emission also increases super-linearly in an unintentionally boron-contaminated area. The threshold probe current of non-linear increase of excitonic emission is in accordance with the emergence of the EHL peak. It is considered that the non-linear increase of excitonic emissions is due to the increase in the radiative recombination rate of free excitons under high exciton density.

AB - Free-exciton emissions increase non-linearly by cathodoluminescence (CL) above the threshold probe current of 30 μA in high-pressure high-temperature synthetic type-IIa diamond. A droplet of electron-hole liquid (EHL) is also observed by CL for the first time. Furthermore, boron acceptor bound-exciton emission as well as free-exciton emission also increases super-linearly in an unintentionally boron-contaminated area. The threshold probe current of non-linear increase of excitonic emission is in accordance with the emergence of the EHL peak. It is considered that the non-linear increase of excitonic emissions is due to the increase in the radiative recombination rate of free excitons under high exciton density.

KW - Cathodoluminescence

KW - Electron-hole liquid

KW - Free exciton

KW - High-pressure high-temperature type-IIa diamond

KW - Non-linear increase

UR - http://www.scopus.com/inward/record.url?scp=0346119971&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346119971&partnerID=8YFLogxK

U2 - 10.1016/S0925-9635(03)00194-8

DO - 10.1016/S0925-9635(03)00194-8

M3 - Article

AN - SCOPUS:0346119971

VL - 12

SP - 1995

EP - 1998

JO - Diamond and Related Materials

JF - Diamond and Related Materials

SN - 0925-9635

IS - 10-11

ER -

Non-linear increases in excitonic emission in synthetic type-IIa diamond

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ASJC Scopus subject areas

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