Overcoming optical loss in polariton system with synthetic complex frequency waves recovering lossless propagation

https://hku.hk/press/news_detail_27063.html

"synthetic complex wave excitation achieves virtual gain and counteract ohmic loss (energy dissipation) in phonon polaritons (hBN and MoO3)... complex frequency waves achieve virtual gain and compensate for loss in optical system, exhibiting oscillation and amplification simultaneously enabling more comprehensive representation of wave behaviour and compensation for energy loss... fast, compact optical data storage and processing, sound-, elastic-, and quantum-waves, sensors, high-resolution imaging"

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