Summary
Phononic frequency combs are typically generated in mechanical resonators through nonlinear interactions of phonon modes. However, a recent study utilized optical tweezers to produce overtone frequency combs without the need for mechanical nonlinearities. By combining overtone and modal-coupling effects, researchers were able to create broadband frequency combs with hyperfine frequency spacing. This paper investigates a scenario where optical tweezers are sufficiently weak to induce overtone effects, yet strong enough to impact modal coupling-mediated frequency combs. The study examines how the existence band of phononic combs is influenced by the wavelength and power of optical tweezers.
