Cannot change the laravel app name

I'm using php artisan app:name L&K Biomedics to set the name of the app. But I get an error saying,

'L' is not recognized as an internal or external command,
operable program or batch file.

I'm new to Laravel. What I'm doing wrong here.

And is there a way to undo this command? I mean, if it changed the name to L& how can I change back it?

via Chebli Mohamed