|Budget Amount *help
¥51,480,000 (Direct Cost: ¥39,600,000、Indirect Cost: ¥11,880,000)
Fiscal Year 2012: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
Fiscal Year 2011: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
Fiscal Year 2010: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
Fiscal Year 2009: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
Fiscal Year 2008: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
We have interested in coupled systems between photon fields and electron fields in excited states of semiconductors to construct nonequilibrium optical response theories taking into account the dynamically correlation among excited electrons. We have applied such theories to lasing processes and spontaneous emission processes to understand comprehensively semiconductor lasers. In particular, crossover between cavity-polariton condensates and lasing is successfully clarified, which is a typical phenomenon of the “equilibrium-nonequilibrium crossover,” a long-standing issue in statistical physics. Phase transition of photon states in a coupled cavity array is also studied stressing its potential to applications.