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Probing near Dirac point electron-phonon interaction in graphene

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : Probing near Dirac point electron-phonon interaction in graphene
นักวิจัย : Shang, Jingzhi , Yan, Suxia , Cong, Chunxiao , Tan, Howe-Siang , Yu, Ting , Gurzadyan, Gagik G.
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Shang, J., Yan, S., Cong, C., Tan, H.-S., Yu, T., & Gurzadyan, G. G. (2012). Probing near Dirac point electron-phonon interaction in graphene. Optical Materials Express, 2(12), 1713-1722. , 2159-3930 , http://hdl.handle.net/10220/10932 , http://dx.doi.org/10.1364/OME.2.001713
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Optical materials express
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Carrier dynamics in graphene films on CaF2 have been measured in the mid infrared region by femtosecond pump-probe spectroscopy. The relaxation kinetics shows two decay times. The fast time component is ~0.2 ps, which is attributed to the mixture of initial few ultrafast intraband and interband decay channels. The slow component is ~1.5 ps, which is primarily assigned to optical phonon-acoustic phonon scattering. The contribution of fast component exhibits an increase trend in the probe photon frequencies from 2600 to 3100 cm−1. At the probe frequency of 2700 cm−1, the accelerated carrier relaxation was detected, which resulted from the interband triple-resonance electron-phonon scattering in graphene. At the probe frequency of 3175 cm−1, a clear instant negative differential transmission signal was observed, which is due to stimulated two-phonon emission involved with G phonons in graphene. This result indicates that graphene can be used as a source of coherent ultrashort sound-wave emission.

บรรณานุกรม :
Shang, Jingzhi , Yan, Suxia , Cong, Chunxiao , Tan, Howe-Siang , Yu, Ting , Gurzadyan, Gagik G. . (2555). Probing near Dirac point electron-phonon interaction in graphene.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Shang, Jingzhi , Yan, Suxia , Cong, Chunxiao , Tan, Howe-Siang , Yu, Ting , Gurzadyan, Gagik G. . 2555. "Probing near Dirac point electron-phonon interaction in graphene".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Shang, Jingzhi , Yan, Suxia , Cong, Chunxiao , Tan, Howe-Siang , Yu, Ting , Gurzadyan, Gagik G. . "Probing near Dirac point electron-phonon interaction in graphene."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Shang, Jingzhi , Yan, Suxia , Cong, Chunxiao , Tan, Howe-Siang , Yu, Ting , Gurzadyan, Gagik G. . Probing near Dirac point electron-phonon interaction in graphene. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.