To my knowledge nightmares have little to no research on them period.
Nightmares would be a nightmare to study! Haha....ha....I'll get my coat. >__>
But seriously, dreams are relatively simple to study by comparison because it's pretty consistent. If someone goes to sleep, they're probably going to dream (even if they don't remember it when they wake up). But nightmares are a fairly rare occurrence and there's no real surefire method to produce one on command. You could study the same subject every single night for years on end without getting a single piece of usable data because they simply didn't have a nightmare. I can't remember the last one I had personally, for example, but has to have been at least 4 or 5 years.
You think people would actually be interested in that stuff?
I've had nightmares about 5-6 days a week minimum for the last 10 years or so. I still do and usually can remember about 60% of them for long enough to jot them down in a notebook if I'm not too lazy to get up (which I usually am so I just think about them).
I'm sure there's several researchers out there somewhere that would love you. I personally think everybody's got some quirk about them that would make them the perfect test subject for some researcher somewhere and they just never actually happen to connect. It's pretty ridiculous the kinds of random, strange, and sometimes seemingly completely arbitrary focuses scientists and researchers can come up with to ask questions about.
Couldn't hurt to do a little digging and see if there's a sleep study going on somewhere near where you live. ---