1. Jun 12, 2007

plxmny

Hi Y'all,

I would like to demonstrate electron tunneling in my Modern Physics lab class.

Does anyone know of how to set such an experiment up?

We have a lot of equipment and $available, so that's not a problem. I don't want to ask the prof beforehand because he's kinda dumb. 2. Jun 12, 2007 AlexHT I can't think of anything that would be all flashy since this is higly microscopic. You could do it with a zerner diode. 3. Jun 12, 2007 berkeman Staff: Mentor You might consider doing "microwave tunneling" instead: http://it.stlawu.edu/~koon/classes/221.222/222L/Tunnel.html You can google microwave tunneling to get more hits and info. As for electron tunneling, I think you'd need to have access to at least a basic (small) semiconductor fabrication lab in order to make something for a demo. Does your school have an experimental fab? 4. Jun 12, 2007 plxmny Thank you very much for both of your replies. I have seen the "photon tunneling on your kitchen table". Someone else is doing that. Yes, we have access to a semiconductor fabrication lab! Just tell me what you have in mind and I can get it rolling! 5. Jun 12, 2007 berkeman Staff: Mentor Quiz question -- what common electronic components use electron tunelling in their funtion? (and which would be the simplest to fab?) 6. Jun 12, 2007 plxmny The average answer seems to be "tunneling diode" but it is difficult to see how one could demonstrate tunneling with such a device - other than to point at it and say "there's tunnelin' in that thar device!" ;) 7. Jun 12, 2007 RandallB A Mosfet can have electron tunelling but I think it was a bad thing that needed to be minimized. 8. Jun 12, 2007 Creator Do you have an oscilloscope? Build a Scanning Tunnelling Microscope. Here's how to do it for 100 bucks....well, OK,$150. (Yes, you can create atomic images....)

http://www.geocities.com/spm_stm/Project.html

Creator

Last edited: Jun 12, 2007
9. Jun 12, 2007

Staff: Mentor

....except in at least one very important application in electronics...

If you could tunnel charge onto, say, a floating gate of a MOSFET, what practical use could that be.... ?

10. Jun 12, 2007

plxmny

Thanks, Creator - I will definitely check that out! I appreciate your help!

(Amazing how many non-answers I get on these silly forums)