What do you mean by modulation? Because you're not modulating at all. It's the same key . . . you're just shifting the tonic to the major.

By the way, the tonic is usually the note/chord that you begin the progression on. So if your thing goes F#m, D, Bm, A then you know it's in F#m right off the bat.

Here's a simple punk/rock progression from an old band I used to play in. The verses were in major - A, D, E. Then on the chorus it would go to F#m, D, Bm, A. Try playing that and let me know what you think. Feel free to jazz up the chords a bit - Amaj7, Dmaj7, E9 (repeat) - F#m7, Dmaj7, Bm7, Aadd2. I dunno, something like that . . .

You will notice when you go to the F# the whole feel of the progression will change to minor.