Laser oscillations of whispering gallery modes in thiophene/phenylene co-oligomer microrings

被引：36

作者：

Fujiwara, Seiji ^{[1
]}

Bando, Kazuki

Masumoto, Yasuaki

Sasaki, Fumio

Kobayashi, Shunsuke

Haraichi, Satoshi

Hotta, Shu

机构：

[1] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan

[2] Univ Tsukuba, TARA, Tsukuba, Ibaraki 3058571, Japan

[3] AIST, Photon Res Inst, Tsukuba, Ibaraki 3058568, Japan

[4] Natl Inst Adv Ind Sci & Technol, Nanoelectr Res Inst, Tsukuba, Ibaraki 3058568, Japan

[5] Kyoto Inst Technol, Grad Sch Sci & Technol, Dept Macromol Sci & Engn, Kyoto 6068585, Japan

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 02期

关键词：

D O I：

10.1063/1.2755925

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Laser oscillation of whispering gallery modes was observed in microring structures of semiconducting thiophene/phenylene co-oligomer (TPCO) crystals at room temperature. Microring structures were formed by dry etching from thin film crystals of TPCO. The thresholds for the laser oscillation of a microring and a thin film crystal are 200 and 1400 mu J/cm(2) for picosecond excitation, respectively. Therefore, the threshold for the microring was reduced to 1/7 of that for the thin film crystal. The dramatic reduction of threshold clearly demonstrates the importance of microcavity in making efficient organic semiconductor lasers. (C) 2007 American Institute of Physics.

引用

页数：3

共 23 条

[1] Origin of the amplified spontaneous emission from thiophene/phenylene co-oligomer single crystals: Towards co-oligomer lasers [J].

Bando, K ;

Nakamura, T ;

Masumoto, Y ;

Sasaki, F ;

Kobayashi, S ;

Hotta, S .

JOURNAL OF APPLIED PHYSICS, 2006, 99 (01)

[2] Ring microlasers from conducting polymers [J].

Frolov, SV ;

Shkunov, M ;

Vardeny, ZV ;

Yoshino, K .

PHYSICAL REVIEW B, 1997, 56 (08) :R4363-R4366

[3]

Hotta S, 2002, ADV MATER, V14, P498, DOI 10.1002/1521-4095(20020404)14:7<498::AID-ADMA498>3.0.CO

[4]

2-Y

[5] Synthesis of thiophene/phenylene co-oligomers. II. Block and alternating co-oligomers [J].

Hotta, S ;

Kimura, H ;

Lee, SA ;

Tamaki, T .

JOURNAL OF HETEROCYCLIC CHEMISTRY, 2000, 37 (02) :281-286

[6] Laser oscillation in monolithic molecular single crystals [J].

Ichikawa, M ;

Hibino, R ;

Inoue, M ;

Haritani, T ;

Hotta, S ;

Araki, K ;

Koyama, T ;

Taniguchi, Y .

ADVANCED MATERIALS, 2005, 17 (17) :2073-+

[7] Improved crystal-growth and emission gain-narrowing of thiophene/phenylene co-oligomers [J].

Ichikawa, M ;

Hibino, R ;

Inoue, M ;

Haritani, T ;

Hotta, S ;

Koyama, T ;

Taniguchi, Y .

ADVANCED MATERIALS, 2003, 15 (03) :213-+

[8]

Ichikawa M, 2002, ADV MATER, V14, P1272, DOI 10.1002/1521-4095(20020916)14:18<1272::AID-ADMA1272>3.0.CO

[9]

2-F

[10] Spectrally narrowed emissions in single crystals of 2,5-bis(4-biphenylyl)thiophene [J].

Ishikawa, K ;

Sasaki, F ;

Kobayashi, S ;

Yanagi, H ;

Hotta, S ;

Taniguchi, Y .

JOURNAL OF LUMINESCENCE, 2004, 108 (1-4) :127-130

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