It is important to write thank you notes to your interviewers. It acknowledges their time and demonstrates professionalism.
Make sure to get everyone’s name that you interview with
Email/Written Thank You
Address to each person
Thank them for their time
Highlight key things from the interview that interest you/how you can contribute
Express excitement about opportunity again
Share your availability to start
Find more tips and an example thank you note here, from ASU's Career Development Center.