“…Featured with many special physical properties, GaSb has attracted much attention for optoelectronic applications [1,2]. In particular, envisioned as an important III-V semiconductor candidate for high-speed and optoelectronic device applications, plenty of attention has been given to GaSb for optoelectronic devices with low-threshold voltage, photodetectors with applications to optical fiber communication systems in the near-to middle-infrared wavelength range, high-frequency devices and high-efficiency thermo-photovoltaic.…”