In order to open a new file explorer window in a specific location from Powershell, you can use the following very simple command in a Powershell script:
$Folder = 'D:\' Invoke-Item $Folder
This can come in handy in certain cases. For example if you are making a script that places files in a certain location, and you then want the user to be able to see the output files and copy it to other destinations.