TY  - SER
AU  - Sun, Yongbao
AU  - Yoon, Yoseob
AU  - Steger, Mark
AU  - liu, Gangqiang
TI  - Direct Measurement of Polariton-Polariton Interaction Strength
KW  - Exciton-Polaritons
KW  - Microcavity
KW  - Two Dimensional Model
ER  -