Duplicate File Structure With Empty Files

$SourceRoot = "Z:\foo"
$DestRoot = "Z:\bar"
$SourceContent = Get-ChildItem $SourceRoot -Recurse

# Populate the destination with files and sub-folders.
$SourceContent | ForEach-Object {
    If ($_.PSIsContainer) {$NewItemType = "Directory"}
    Else {$NewItemType = "File"}

    $newitem = ($_.fullname).replace($SourceRoot, $DestRoot)
    New-Item -Path $newitem -ItemType $NewItemType -force
}

# Duplicate the source item timestamps.
# When a file is written to a folder, it causes the folder's 'LastWriteTime' to
# be updated. This is why we don't set the timestamps while populating the
# destination with files and sub-folders.
$SourceContent | ForEach-Object {
    $newitem = ($_.fullname).replace($SourceRoot, $DestRoot)
    (Get-Item -Path $newitem).LastWriteTime = $_.LastWriteTime
    (Get-Item -Path $newitem).CreationTime = $_.CreationTime
}