Quantum Dot Laser Theory

Quantum Dot Laser Theory describes how tiny semiconductor particles called quantum dots emit light when energized. These dots have discrete energy levels due to their nanometer size, allowing precise control over the emitted light's wavelength. When electrons are injected, they occupy these energy levels and release photons—light particles—when they drop back to lower levels. Because quantum dots can be engineered for specific sizes, they produce highly efficient, stable lasers with adjustable colors, offering advantages like lower threshold currents and improved temperature stability. This makes quantum dot lasers valuable for applications like telecommunications, medical devices, and advanced imaging.