Physical complex-frequency probing robustly sharpens spectral features against noise, while post-detection synthesis shows limited gains under realistic noise and is often outperformed by simpler filtering.
Synthesized complex-frequency excitation for ultrasensitive molecular sensing,
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Revealing Sharp Spectral Features with Complex Frequency Excitations: Challenges and Opportunities
Physical complex-frequency probing robustly sharpens spectral features against noise, while post-detection synthesis shows limited gains under realistic noise and is often outperformed by simpler filtering.