Creating curved plane

I am trying to create this under my logo:

How do I go about doing this?

Add plane, extrude (E) back edge upwards, select outlining edges and set their crease as 1 (shift+E and move mouse, lmb to confirm), add subdivision surface modifier with level 3 (ctrl+3), in object mode set shading to smooth from the tool shelf.

JA12 you are an amazing member. Thank you so much!