Graph showing intensity counts versus wavelength with a prominent peak at approximately 349 nanometers, and two labeled points at 349 nm and 405 nm, with the labels 'Center', '349 nm', and '405 nm'.
Graph showing intensity counts versus energy in electron volts, with peaks at 349 nm and 405 nm, labeled as 'Edge'.

InGaN quantum well device
PL

405 nm and 349 nm kits.

The different excitations allow access to different information in the device. The 405 nm light directly accesses the quantum well, while the 349 nm light allows access to the surrounding layers.

405 nm: 10 ms integration
345 nm: 50 ms integration