[kazinator]

That word would be misleading because it has been taken to refer to vacuum tubes.

I would call this a "trioptode". That incorporates the "tri" and "ode", plus a reference to that it is optical: the third terminal modulates light.

[detourdog]

I will start refer to them as trioltodes.

[MadnessASAP]

I have chosen LET, Light Emitting Triode, in the 2 minutes I have known about this

[viraptor]

Can't wait for all the confusion in LET/LED pronunciation.

[ggm]

and an octet of data carried through a gate like this is a... Trilobyte?