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^*

^*Corresponding author for this work

School of Fundamental Science and Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1995-1998
Number of pages	4
Journal	Diamond and Related Materials
Volume	12
Issue number	10-11
DOIs	https://doi.org/10.1016/S0925-9635(03)00194-8
Publication status	Published - 2003

Keywords

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

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Chemistry(all)
Mechanical Engineering
Materials Chemistry
Electrical and Electronic Engineering

Access to Document

10.1016/S0925-9635(03)00194-8

Cite this

@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

SN - 0925-9635

VL - 12

SP - 1995

EP - 1998

JO - Diamond and Related Materials

JF - Diamond and Related Materials

IS - 10-11

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this