Fig. 1. (Color online) (a) An image of the Ga₂O₃ microwire cluster. (b) An image displays the length scale information of the Ga₂O₃ MWs. (c) A SEM image of multiple Ga₂O₃ MWs. (d) A SEM image of single Ga₂O₃ microwire. The inset is the cross-sectional view of the Ga₂O₃ microwire.

Fig. 2. (Color online) XRD pattern of Ga₂O₃ microwire.

Fig. 3. (Color online) (a) Low magnification TEM image of a β-Ga₂O₃ microwire. (b) High resolution TEM image of a β-Ga₂O₃ MW. The inset is the SAED pattern of the microwire.

Fig. 4. (Color online) (a) I–V curves of a β-Ga₂O₃ MW MSM photodetector under dark and 250 nm illumination. (b) Photoresponse spectrum of the β-Ga₂O₃ MW MSM device under 10 V bias. (c) EQE and detectivity spectrum of the β-Ga₂O₃ MW MSM device under 10 V bias.

Fig. 5. (Color online) (a) I–t curve of the β-Ga₂O₃ MW MSM device under 250 nm illumination under 10 V bias. (b) Time response characteristics of the β-Ga₂O₃ MW MSM photodetector.