  We investigate the impact of localized laser heating on the auto-oscillation
properties of a 170 nm wide nano-constriction spin Hall nano-oscillators (SHNO)
fabricated from a NiFe/Pt bilayer on a sapphire substrate. A 532 nm continuous
wave laser is focused down to a spot size of about 500 nm at a power ranging
from 0 to 12 mW. Through a comparison with resistive heating, we estimate a
local temperature rise of about 8 K/mW. We demonstrate reversible laser tuning
of the threshold current, the frequency, and the peak power, and find that the
SHNO frequency can be tuned by up to 350 MHz, which is over three times more
than the current tuning alone. Increasing the temperature also results in
increased signal jitter, an increased threshold current, and a reduced maximum
current for auto-oscillations. Our results open up for optical control of
single SHNOs in larger SHNO networks without the need for additional voltage
gates.
