Figure.1 | Tailoring VCSEL performance through cavity geometry engineering. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure.1 | Tailoring VCSEL performance through cavity geometry engineering.

Caption

Figure.1 | Tailoring VCSEL performance through cavity geometry engineering. (a) Five distinct cavity geometries—circular, square, D-shaped, mushroom, and pentagonal—enable control over the output waveform and modal properties of VCSELs. (b) Near-field emission profiles from fabricated devices highlight differences in spatial mode structure across geometries. (c) SEM image of the fabricated VCSEL array, showing precise lithographic patterning of the various cavity shapes. (d) Statistical comparison of maximum optical power across over 60 devices, showing enhanced emission from non-circular geometries, especially the pentagonal and mushroom designs. (e) Demonstration of speckle suppression using a mushroom-shaped VCSEL, leading to improved image contrast in a resolution target compared to a conventional circular VCSEL.

Credit

Boon S. Ooi et al.

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