Chin. Phys. Lett.  2006, Vol. 23 Issue (5): 1276-1277    DOI:
Original Articles |
Measurement of Photoluminescence of Cu2O at 2K
ZHOU Yu1,2;ZHANG Gui-Zhong1,2;XIANG Wang-Hua1,2;KETTERSON J. B.3
1College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072 2Key Laboratory of Optoelectronic Information and Technical Science (Ministry of Education), Tianjin University, Tianjin 300072 3Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
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ZHOU Yu, ZHANG Gui-Zhong, XIANG Wang-Hua et al  2006 Chin. Phys. Lett. 23 1276-1277
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Abstract We present our measured photoluminescence of the quadrupolar transitions of the yellow series excitons of cuprous oxide at 2K. By tuning the excitation energy in the two-photon quadrupolar absorption scheme of Cu2O, it is found that the band-gap value associated with this optical process can be characterized by a sharp resonance at 2.036eV at cryogenic temperature. This energy value is helpful to guide a proper excitation for creating cold excitonic gas in this crystal.
Keywords: 71.35.Cc      73.20.Mf      78.40.Fy      78.55.Hx     
Published: 01 May 2006
PACS:  71.35.Cc (Intrinsic properties of excitons; optical absorption spectra)  
  73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))  
  78.40.Fy (Semiconductors)  
  78.55.Hx (Other solid inorganic materials)  
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