Role of the Transition Dipole Amplitude and Phase on the Generation of Odd and Even High-Order Harmonics in Crystals
- Nanjing Univ. of Science and Technology (China). Dept. of Applied Physics; Kansas State Univ., Manhattan, KS (United States). J. R. Macdonald Lab. Dept. of Physics
- Kansas State Univ., Manhattan, KS (United States). J. R. Macdonald Lab. Dept. of Physics; Taizhou Univ. (China). Dept. of Physics
- Kansas State Univ., Manhattan, KS (United States). J. R. Macdonald Lab. Dept. of Physics
- Nanjing Univ. of Science and Technology (China). Dept. of Applied Physics
- Nanjing Univ. of Science and Technology (China). Dept. of Applied Physics; Chinese Academy of Sciences (CAS), Dalian (China). State Key Lab. of Molecular Reaction Dynamics. Dalian Inst. of Chemical Physics
Since the first observation of odd and even high-order harmonics generated from ZnO crystals in 2011, the dependence of the harmonic yields on the orientation of the laser polarization with respect to the crystal axis has never been properly interpreted. This failure has been traced to the lack of a correct account of the phase of the transition dipole moment between the valence band and the conduction band. Using a simple one-dimensional two-band model, here we demonstrate that the observed odd harmonics is directly related to the orientation dependence of the magnitude of the transition dipole, while even harmonics is directly related to the phase of the transition dipole. Our result points out the essential role of the complex transition dipole moment in understanding harmonic generation from solids that has long been overlooked so far.
- Research Organization:
- Kansas State Univ., Manhattan, KS (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- FG02-86ER13491
- OSTI ID:
- 1541327
- Alternate ID(s):
- OSTI ID: 1454645
- Journal Information:
- Physical Review Letters, Vol. 120, Issue 25; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Crystal symmetry and polarization of high-order harmonics in ZnO
Polarization Flipping of Even-Order Harmonics in Monolayer Transition-Metal Dichalcogenides