Controlling the beam profile involves several strategies:
Beam Shaping Optics: Lenses, mirrors, and spatial light modulators can be used to alter the beam profile. Apertures and Masks: These are used to selectively block parts of the beam, shaping the remaining intensity distribution. Feedback Systems: Real-time monitoring and adjustment systems can dynamically control the beam profile during operation.
Proper control ensures that the beam remains stable and well-defined, enhancing the performance of nanofabrication and imaging techniques.