Exciton-phonon coupling in individual ZnTe nanorods studied by resonant Raman spectroscopy

نویسندگان

  • Q. Zhang
  • J. Zhang
  • M. I. B. Utama
  • B. Peng
  • M. de la Mata
  • J. Arbiol
  • Qihua Xiong
چکیده

Q. Zhang,1 J. Zhang,1 M. I. B. Utama,1 B. Peng,1 M. de la Mata,2 J. Arbiol,2,3 and Qihua Xiong1,4,* 1School of Physical and Mathematical Sciences, PAP 04-14, 21 Nanyang Link, Nanyang Technological University, Singapore 637371, Singapore 2Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus de la UAB, 08193 Bellaterra, Catalonia, Spain 3Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Catalonia, Spain 4Division of Microelectronics, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore (Received 28 October 2011; revised manuscript received 9 January 2012; published 10 February 2012)

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Highly enhanced exciton recombination rate by strong electron-phonon coupling in single ZnTe nanobelt.

Electron-phonon coupling plays a key role in a variety of elemental excitations and their interactions in semiconductor nanostructures. Here we demonstrate that the relaxation rate of free excitons in a single ZnTe nanobelt (NB) is considerably enhanced via a nonthermalized hot-exciton emission process as a result of an ultrastrong electron-phonon coupling. Using time-resolved photoluminescence...

متن کامل

Raman spectroscopy and photoluminescence of ZnTe thin films grown on GaAs

We report resonant Raman scattering and photoluminescence ~PL! measurements on two ZnTe thin films grown by molecular-beam epitaxy on GaAs substrates with thicknesses around 0.5 and 1.0 mm. The data have been obtained by using the different excitation energies of an Ar laser to distinguish Raman from PL and analyze resonant effects. The characteristic features of the low-temperature PL spectra ...

متن کامل

Exciton transition energy in photoluminescence of single-walled carbon nanotubes

Photoluminescence excitation (PLE) spectroscopy of single-walled carbon nanotubes (SWNTs) has been extensively studied for characterization of their unique electronic properties due to the one-dimensionality. The precise evaluation of exciton transition energy is essential for experimental assignments of optical absorption, photoluminescence, and resonant Raman scatterings. Here, several experi...

متن کامل

Resonant Raman scattering in Ga(As, P) mediated by (localized exciton-LO phonon) complex

Resonance light scattering experiments in polar crystals at energies corresponding to Eex + n012703C9LO have suggested that dressed excitons are the relevant intermediate states. Configuration coordinate model is applied to calculate the resonance Raman spectrum (intensity of phonons lines as a function of incident frequency) of the mixed crystal GaAs0.2P0.8 and compared with experimental resul...

متن کامل

Localized suppression of longitudinal-optical-phonon-exciton coupling in bent ZnO nanowires.

Using confocal micro-Raman and photoluminescence spectroscopy, we studied bending effects on optical properties of individual ZnO nanowires. Raman spectroscopy shows that local tensile strain can be introduced by bending the nanowire. The strain is expected to reduce the band gap on the bent part and modify the local phonon-exciton interaction. The corresponding micro-photoluminescence spectra ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2012