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<DIV><FONT size=2>Hi, everybody!</FONT></DIV>
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<DIV><FONT size=2>I'm trying to perform a calculation for the optical properties
of a bulk material. As we know, it can obtain it form the imaginary part of the
dielectric constant. but I don't know if the PWSCF code could do
this.</FONT></DIV>
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<DIV><FONT size=2>Have anybody done this before?</FONT></DIV>
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<DIV><FONT size=2>Kesong Yang</FONT></DIV>
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<DIV><FONT size=2>School of Physics and Microelectronics</FONT></DIV>
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<DIV><FONT size=2>Shandong University, Jinan 250100, People¡¯s Republic of
China</FONT></DIV>
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