please see Art. 7 I a and b of the mentioned EC Directive.
You or your husband would need to have a job in Germany or the necessary money for the stay.
Your wife will be able to stay without any problem. You need her to get any visa. Without her it would be far more difficult.
The issue is that for getting the permit for you even through your wife she'll need to be able to pay for you during the stay. This is why they want the 12000 Euros.
As a scientist you may try to get a blue card, but in that case you'll need to have a minimum salary of 44.800 Euros brutto (in 2012), in some exception 35000 Euros.
Thank you so much for the info for blue card .But I was asking freelancer visa which is also known as artist visa.Since this can give me work permit as well as residence permit .Please look at this link and let me know what do you advise.Which one is better this visa or visa through my wife.I heard freelance visa gives you permit for one year ,dose not need this 12000 Euro and easy to get .Please advise.
You will also need to have proof the ability to cover the living costs for at least a year.
You will need a full business plan.
Thus, there will be the same problems as with the other visa.
For the necessary paperwork, see for example:
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