1. The multi-photon induced Fano effect
- Author
-
Konstantin Litvinenko, B. N. Murdin, C. R. Pidgeon, Britta Redlich, Nickolay Abrosimov, Yury M. Andreev, Nguyen H. Le, and Zhiming Huang
- Subjects
Nonlinear optics ,Photon ,Science ,многофотонные процессы ,media_common.quotation_subject ,Silicon photonics ,Optical spectroscopy ,General Physics and Astronomy ,02 engineering and technology ,Fano plane ,Interference (wave propagation) ,01 natural sciences ,Asymmetry ,Article ,General Biochemistry, Genetics and Molecular Biology ,law.invention ,Mathematics::Algebraic Geometry ,law ,молекулярная спектроскопия ,0103 physical sciences ,Atom ,Bound state ,Physics::Atomic Physics ,Фано эффект ,010306 general physics ,фотоионизация ,media_common ,Physics ,Multidisciplinary ,General Chemistry ,FELIX Infrared and Terahertz Spectroscopy ,атомная спектроскопия ,021001 nanoscience & nanotechnology ,Laser ,Qubit ,Atomic physics ,0210 nano-technology - Abstract
The ordinary Fano effect occurs in many-electron atoms and requires an autoionizing state. With such a state, photo-ionization may proceed via pathways that interfere, and the characteristic asymmetric resonance structures appear in the continuum. Here we demonstrate that Fano structure may also be induced without need of auto-ionization, by dressing the continuum with an ordinary bound state in any atom by a coupling laser. Using multi-photon processes gives complete, ultra-fast control over the interference. We show that a line-shape index q near unity (maximum asymmetry) may be produced in hydrogenic silicon donors with a relatively weak beam. Since the Fano lineshape has both constructive and destructive interference, the laser control opens the possibility of state-selective detection with enhancement on one side of resonance and invisibility on the other. We discuss a variety of atomic and molecular spectroscopies, and in the case of silicon donors we provide a calculation for a qubit readout application., Fano resonances occur in many platforms that have auto-ionizing states. Here the authors show that auto-ionizing states are not required for multi-photon Fano resonance in a Si:P system with significant screening by using a pump-probe method.
- Published
- 2021