yes
It is a great way to say thanks! Totally accepted in the workforce.
You can send an email thanks but I would work to cement the relationship with a handwritten Thank You note. Go to the local drug store and buy a pack of plain cards that say Thank you on the outside and are blank on the inside. Keep the design plain. If you met in person then express your gratitude for the meeting and how valuble it was to meet this person. Don't gush. Better to write that it was great to meet on Tuesday or whatever day at such and such a time to interview about whatever position you did. They might meet fifty people a day for many positions. You want to remind them of who you are and when you met and for what position. Look forward to meeting them again and sign your full name and all your numbers and email address. Stamp and send this the same day of your meeting. They will get it within two days. You will be the only one to do this. You will stand out. Do not gush in your note. Keep it simple. If you get the job, send another one. If the receptionist liked you and helped to get you in the office, send her one. I have interviewed and hired hundreds of people and have gone on many interviews myself. I have walked into the personel office and seen my Thank You card from the first talk sitting on a file cabinet.
There is no one in the world who does not like to be thanked. A hand written note has more depth than email.