This is code sample of how to use Shared Access Signatures (SAS) to authenticate and access to ADLS Gen 2 from Azure Databricks. You can generate SAS from Container, Folder, Sub-Folder, File level for specific access permission (e.g. read, list, write, etc...). Then using Databricks to access ADLS particular Container, Folder, Sub-Folder or individual file with specific SAS key.
Enjoy.