University of California

Sheng Chu

Jianlin Liu

Systems and methods for electrically pumped, surface-emitting and edge emitting ZnO ultraviolet diode lasers are disclosed. The ZnO diode laser may be fabricated using growth processes (e.g., MBE) to form Sb-doped ZnO as a p-type layer and doped ZnO as an n-type layer. ZnO-based quantum well structures may be further formed in between the n- and p-type ZnO layers. The ZnO layers and quantum wells may be grown in columnar structures which act as resonant cavities for generated light, significantly improving light amplification and providing high power output. For example, ultraviolet lasing at around 380 nm was demonstrated at about room temperature at a threshold current density of about 10 A/cm. The output power was further measured to be about 11.3 &#x3bc;W at about 130 mA driving current.

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Riverside, CA, United States of America

Sheng Chu