Powershell redirection error

PS D:\> write-host hello 2>&1
hello
PS D:\> write-host hello 3>&1
Ampersand not allowed. The & operator is reserved for future use; use "&" to pass ampersand as a string.
At line:1 char:21
+ write-host hello 3>& <<<< 1
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : AmpersandNotAllowed

PS D:\>