A research team consisting of Professor Kyoung-Duck Park and Hyeongwoo Lee, an integrated PhD student, from the Department of Physics at Pohang University of Science and Technology (POSTECH) has pioneered an innovative technique in ultra-high-resolution spectroscopy. Their breakthrough marks the world's first instance of electrically controlling polaritons – hybridized light-matter particles – at room temperature.
This research has been published in Physical Review Letters ("Electrically Tunable Single Polaritonic Quantum Dot at Room Temperature").
Polaritons are "half-light half-matter" hybrid particles, having both the characteristics of photons – particles of light – and those of solid matter. Their unique characteristics exhibit properties distinct from both traditional photons and solid matter, unlocking the potential for next-generation materials, particularly in surpassing performance limitations of optical displays. Until now, the inability to electrically control polaritons at room temperature on a single particle level has hindered their commercial viability.
The research team has devised a novel method called “electric-field tip-enhanced strong coupling spectroscopy”, enabling ultra-high-resolution electrically controlled spectroscopy. This new technique empowers the active manipulation of individual polariton particles at room temperature.
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