2020 Fiscal Year Annual Research Report
Structured complex potentials for designer topological systems and devices in optics
| Project/Area Number |
18F18790
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| Research Institution | Institute of Physical and Chemical Research |
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Principal Investigator |
樽茶 清悟 国立研究開発法人理化学研究所, 創発物性科学研究センター, グループディレクター (40302799)
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| Co-Investigator(Kenkyū-buntansha) |
DEL VALLE INCLAN YAGO BALTASAR 国立研究開発法人理化学研究所, 創発物性科学研究セ ンター, 外国人特別研究員
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| Project Period (FY) |
2018-11-09 – 2021-03-31
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| Keywords | topological / exciton-polariton / non-Hermitian / superfluidity |
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| Outline of Annual Research Achievements |
Experimentally demonstrated a new technique for non-resonant temporal modulation of polariton condensates via the beating of two, frequency-locked lasers. This allows for very fast modulation, and probing of non-adiabatic regimes of carrier relaxation.
Combining the intensity beating with laser-wavefront tailoring, arbitrary spatial potentials with temporal modulation are formed. A 1D conveyor belt has been demonstrated, with the observation of tilted bands and a non-adiabatically pushed condensate. Further, using Laguerre-Gauss laser modes, preliminary measurements of a non-resonantly rotated polariton condensate were achieved.
These new techniques enable as-yet unexplored methods of creating topological states of exciton-polaritons, e.g. by rapid rotation, or by shaken optical lattices.
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| Research Progress Status |
令和2年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和2年度が最終年度であるため、記入しない。
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