Yes, Nepalko lato and Sampada said are both right. You don't need anything else.

Just these: Good Pictures of the wedding where you and your spouse are clearly shown......(They look into these pictures  in detail with few other people if they have doubt about your marriage)

Copy of your H1B.

Your Employer's letter on the letter pad stating hwo much you make.

Your Bank Statement and a letter from you requesting the US Empbassy to issue visa for to your spouse.

 If you have these items, it  will work perfectly! Goodluck RMXYZ!!