We demonstrate a classical analogy to the Fano anti-resonance in levitated optomechanics
by applying a DC electric field. Specifically, we experimentally tune the Fano parameter by
applying a DC voltage from 0 kV to 10 kV on a nearby charged needle tip. We find consistent
results across negative and positive needle voltages, with the Fano line-shape feature able
to exist at both higher and lower frequencies than the fundamental oscillator frequency. We
can use the Fano parameter to characterize our system to be sensitive to static interactions …

< jats: p> We demonstrate a classical analogy to the Fano anti-resonance in levitated
optomechanics by applying a DC electric field. Specifically, we experimentally tune the Fano
parameter by applying a DC voltage from 0 kV to 10 kV on a nearby charged needle tip. We
find consistent results across negative and positive needle voltages, with the Fano line-
shape feature able to exist at both higher and lower frequencies than the fundamental
oscillator frequency. We can use the Fano parameter to characterize our system to be …