TY - JOUR
T1 - Nonlocal optical response of weakly confined excitons in Cu2 O mesoscopic films
AU - Takahata, Mitsuyoshi
AU - Tanaka, Koichiro
AU - Naka, Nobuko
N1 - Funding Information:
This work was partially supported by a Grant-in-Aid for Scientific Research (C) (Grant No. 26400317) and a Grant-in-Aid for Scientific Research (B) (Grant No. 17H02910) from JSPS, Japan.
Publisher Copyright:
© 2018 American Physical Society.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2018/5/24
Y1 - 2018/5/24
N2 - We have demonstrated size-dependent radiative coupling in a Cu2O mesoscopic film, where the spatial matching between the center-of-mass exciton motion and light waves plays an essential role. The observed quadratic increase and oscillation of the photoluminescence intensity with varying film thicknesses (16-1000 nm) indicate a nonlocal response that is unique to mesoscopic systems. Optimally, a 104-fold enhanced radiative rate was found compared with bulk Cu2O. A new degree of freedom in the light-matter interaction is presented, which differs from the mode volume control in cavity quantum electrodynamics.
AB - We have demonstrated size-dependent radiative coupling in a Cu2O mesoscopic film, where the spatial matching between the center-of-mass exciton motion and light waves plays an essential role. The observed quadratic increase and oscillation of the photoluminescence intensity with varying film thicknesses (16-1000 nm) indicate a nonlocal response that is unique to mesoscopic systems. Optimally, a 104-fold enhanced radiative rate was found compared with bulk Cu2O. A new degree of freedom in the light-matter interaction is presented, which differs from the mode volume control in cavity quantum electrodynamics.
UR - http://www.scopus.com/inward/record.url?scp=85047736884&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047736884&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.97.205305
DO - 10.1103/PhysRevB.97.205305
M3 - Article
AN - SCOPUS:85047736884
SN - 2469-9950
VL - 97
JO - Physical Review B
JF - Physical Review B
IS - 20
M1 - 205305
ER -