Ask HN: Help to solve this problem

My wife and me always argue about alarm clocks. She must wake up 30 minutes later than me, so my phone alarm, makes she crazy, because I wake up after 3-5 minutes ringing alarm. I asked my friends, most of them have the same problem. They say they would buy a product that wakes only selected person and doesnt disturb others. I thought about different ideas about that but non of them are perfect. ( wirelessly effecting to brain cells of a particular person, vibrating clocks on body etc.) what do you think, how could this problem be solved?