ridm@nrct.go.th   ระบบคลังข้อมูลงานวิจัยไทย   รายการโปรดที่คุณเลือกไว้

Femtosecond energy relaxation in suspended graphene : phonon-assisted spreading of quasiparticle distribution

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Femtosecond energy relaxation in suspended graphene : phonon-assisted spreading of quasiparticle distribution
นักวิจัย : Shang, Jingzhi , Yu, Ting , Gurzadyan, Gagik G.
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2554
อ้างอิง : Shang, J., Yu, T., & Gurzadyan, G. G. (2012). Femtosecond energy relaxation in suspended graphene: phonon-assisted spreading of quasiparticle distribution. Applied Physics B, 107(1), 131-136. , 0946-2171 , http://hdl.handle.net/10220/10763 , http://dx.doi.org/10.1007/s00340-011-4853-0
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Applied physics B
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Ultra-fast optical measurements of few-layer suspended graphene films grown by chemical vapor deposition were performed with femtosecond pump–probe spectroscopy. The relaxation processes were monitored in transient differential transmission (ΔT/T) after excitation at two different wavelengths of 350 and 680 nm. Intraband electron–electron scattering, electron–phonon scattering, interband Auger recombination and impact ionization were considered to contribute to ΔT/T. All these processes may play important roles in spreading the quasiparticle distribution in time scales up to 100 fs. Optical phonon emission and absorption by highly excited non-equilibrium electrons were identified from ΔT/T peaks in the wide spectral range. When the probe energy region was far from the pump energy, the energy dependence of the quasiparticle decay rate was found to be linear. Longer lifetimes were observed when the quasiparticle population was localized due to optical phonon emission or absorption.

บรรณานุกรม :
Shang, Jingzhi , Yu, Ting , Gurzadyan, Gagik G. . (2554). Femtosecond energy relaxation in suspended graphene : phonon-assisted spreading of quasiparticle distribution.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Shang, Jingzhi , Yu, Ting , Gurzadyan, Gagik G. . 2554. "Femtosecond energy relaxation in suspended graphene : phonon-assisted spreading of quasiparticle distribution".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Shang, Jingzhi , Yu, Ting , Gurzadyan, Gagik G. . "Femtosecond energy relaxation in suspended graphene : phonon-assisted spreading of quasiparticle distribution."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2554. Print.
Shang, Jingzhi , Yu, Ting , Gurzadyan, Gagik G. . Femtosecond energy relaxation in suspended graphene : phonon-assisted spreading of quasiparticle distribution. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2554.