According to D.E. Aspenes, in Properties of Crystalline Silicon, p. 683,
for intrinsic silicon at 1.55 um (0.80 eV), alpha = 0.000 cm-1.
That's zero absorption, to several figures, at that wavelength.
The table lists non-zero absorption below 0.20 eV and above 1.00 eV.
    --Kirt Williams

----- Original Message -----
From: "Sachin Tyagi" 
To: 
Sent: Tuesday, June 22, 2004 11:57 AM
Subject: [mems-talk] optical properties of silicon


>
>  hi
>  i am looking for the value of absorption coefficient of silicon at 1.55
> microne,so if any body can help me,i will be very thank full to him,
>
> thanks to all
> wating for postive reply from any one
>
>
>  sachin tyagi
> indian institute of technology
> madras(chennai),india
>
>
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