Resonant-cavity-enhanced photo detector

Okay kiddo, do you know what a photo detector is? It's like a special camera that can see things you can't see with your eyes - it looks at light and turns it into a signal your computer can understand.

Now, a resonant-cavity-enhanced photo detector is a photo detector that is super good at seeing light. It's like a really fancy camera that can see things really clearly, like tiny details in a picture.

The way it works is kinda complicated, but I'll try to explain it in an easy way. Imagine you're in a room with echoes - like when you shout and hear your voice bounce back. That's because the sound waves are bouncing off the walls of the room, making the sound louder.

Now imagine light waves bouncing around in a tiny space like that - it's called a "cavity". The light waves keep bouncing back and forth, making them stronger and stronger. That means the photo detector can pick up even the tiniest amount of light.

So, a resonant-cavity-enhanced photo detector is a super powerful camera that can see even really, really small amounts of light, thanks to the way the light waves bounce around in a tiny space. Cool, huh?