TY - JOUR
KW - Temperature
KW - Oxide
KW - Perovskite
KW - Oxides
KW - Semiconductor
KW - Chemistry
KW - Semiconductors
KW - Semiconductor quantum dots
KW - Titanium
KW - Calcium compounds
KW - Perovskite solar cells
KW - Stark effect
KW - Circularly polarized optical pulse
KW - Dielectric confinement
KW - Inorganic semiconductors
KW - Light-matter coupling
KW - Light-matter interactions
KW - Perovskite thin films
KW - Solution processability
KW - Straightforward strategy
KW - Semiconductor quantum wells
KW - Calcium derivative
KW - Halogen
KW - Quantum Theory
KW - Thermodynamics
KW - Halogens
AU - D Giovanni
AU - W.K Chong
AU - H.A Dewi
AU - K Thirumal
AU - I Neogi
AU - Ramamoorthy Ramesh
AU - S Mhaisalkar
AU - N Mathews
AU - T.C Sum
AB - Ultrafast spin manipulation for opto-spin logic applications requires material systems that have strong spinselective light-matter interaction. Conventional inorganic semiconductor nanostructures [for example, epitaxial II to VI quantum dots and III to V multiple quantum wells (MQWs)] are considered forerunners but encounter challenges such as lattice matching and cryogenic cooling requirements. Two-dimensional halide perovskite semiconductors, combining intrinsic tunable MQW structures and large oscillator strengths with facile solution processability, can offer breakthroughs in this area. We demonstrate novel room-temperature, strong ultrafast spin-selective optical Stark effect in solution-processed (C6H4FC2H4NH3)2PbI4 perovskite thin films. Exciton spin states are selectively tuned by ∼6.3 meV using circularly polarized optical pulses without any external photonic cavity (that is, corresponding to a Rabi energy of ∼55 meV and equivalent to applying a 70 T magnetic field), which is much larger than any conventional system. The facile halide and organic replacement in these perovskites affords control of the dielectric confinement and thus presents a straightforward strategy for tuning light-matter coupling strength. © 2016 The Authors.
BT - Science Advances
DO - 10.1126/sciadv.1600477
LA - eng
M1 - 6
N1 - cited By 33
N2 - Ultrafast spin manipulation for opto-spin logic applications requires material systems that have strong spinselective light-matter interaction. Conventional inorganic semiconductor nanostructures [for example, epitaxial II to VI quantum dots and III to V multiple quantum wells (MQWs)] are considered forerunners but encounter challenges such as lattice matching and cryogenic cooling requirements. Two-dimensional halide perovskite semiconductors, combining intrinsic tunable MQW structures and large oscillator strengths with facile solution processability, can offer breakthroughs in this area. We demonstrate novel room-temperature, strong ultrafast spin-selective optical Stark effect in solution-processed (C6H4FC2H4NH3)2PbI4 perovskite thin films. Exciton spin states are selectively tuned by ∼6.3 meV using circularly polarized optical pulses without any external photonic cavity (that is, corresponding to a Rabi energy of ∼55 meV and equivalent to applying a 70 T magnetic field), which is much larger than any conventional system. The facile halide and organic replacement in these perovskites affords control of the dielectric confinement and thus presents a straightforward strategy for tuning light-matter coupling strength. © 2016 The Authors.
PB - American Association for the Advancement of Science
PY - 2016
T2 - Science Advances
TI - Tunable room-temperature spin-selective optical Stark effect in solution-processed layered halide perovskites
VL - 2
SN - 23752548
ER -