The 21-year-old attacking midfielder has failed to break into the senior side since joining in January 2012, and only managed two starts in the League Cup last season.
Eisfeld, who has played once for the Germany Under-20 side, scored Arsenal's only goal in a 1-1 tie against West Bromwich Albion, a match the Londoners won on penalties.
A regular in Terry Burton's youth team, the Borussia Dortmund academy product will look to add to his three pre-season goals during 2012 and 2013 tours of Asia.
Eisfeld has signed a two-year deal with Felix Magath's side, with the option of a further 12 months.
Good luck to him in the future. Like Aneke he looked promising and hopefully we've put a buy back clause in his contract- Jay_D