scholarly journals Broadband coherent perfect absorption by cavity coupled to three-level atoms in linear and nonlinear regimes

2021 ◽  
Author(s):  
Liyong Wang ◽  
Jiangong Hu ◽  
Jiajia Du ◽  
Ke Di
Keyword(s):  
Quantum Electrodynamics ◽  
Optical Cavity ◽  
Cavity Quantum Electrodynamics ◽  
Optical Logic ◽  
Perfect Absorption ◽  
Coherent Perfect Absorption ◽  
Communication Devices ◽  
Linear And Nonlinear ◽  
Output Field ◽  
Nonlinear Regimes

Abstract A broadband coherent perfect absorption (CPA) scheme consisting of an optical resonator coupled with three-level atoms excited by single cavity mode is proposed and analyzed. We show the output light field from the system is completely suppressed under specific conditions when the system is excited in linear and nonlinear regimes by two identical light fields from two ends of optical cavity. An analytical broadband CPA criterion for central and sideband excitations of cavity quantum electrodynamics (CQED) system is derived in linear regime. Moreover, we show the resonant excitation criterion for CPA is greatly extended in nonlinear regime. A new type of bistability behavior is found. The output field intensity and the bistability curve can be well tuned by dynamically adjusting system parameters. Our results demonstrate that the CPA is quite universal, and it should be useful in a variety of applications in optical logic and optical communication devices.

Magneto-Optical Cavity Quantum Electrodynamics Effects in Quantum Dot Micropillar Systems

2010 ◽  
Author(s):  
Stephan Reitzenstein ◽  
Steffen Munch ◽  
Philipp Franeck ◽  
Arash Rahimi-Iman ◽  
Tobias Heindel ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Quantum Electrodynamics ◽  
Optical Cavity ◽  
Cavity Quantum Electrodynamics

Optical cavity quantum electrodynamics with dark-state polaritons

2014 ◽  
Vol 89 (4) ◽  
Author(s):  
G. W. Lin ◽  
Jiangbin Gong ◽  
J. Yang ◽  
Y. H. Qi ◽  
X. M. Lin ◽  
...  
Keyword(s):  
Quantum Electrodynamics ◽  
Optical Cavity ◽  
Cavity Quantum Electrodynamics ◽  
Dark State

scholarly journals Ring-Polymer Quantization of Photon Field in Polariton Chemistry

2020 ◽  
Author(s):  
Sutirtha N. Chowdhury ◽  
Arkajit Mandal ◽  
Pengfei Huo
Keyword(s):  
Radiation Field ◽  
Quantum Electrodynamics ◽  
Quantum Dynamics ◽  
Optical Cavity ◽  
Cavity Quantum Electrodynamics ◽  
Transfer Model ◽  
Quantum Distribution ◽  
Photon Field ◽  
Mediated Electron Transfer ◽  
Ring Polymer

We use the ring-polymer (RP) representation to quantize the radiation field inside an optical cavity to investigate polariton quantum dynamics. Using a charge transfer model coupled to an optical cavity, we demonstrate that the RP quantization of the photon field provides accurate rate constants of the polariton mediated electron transfer (PMET) reaction compared to the Fermi's Golden rule. Because RP quantization uses extended phase space to describe the photon field, it significantly reduces the computational costs compared to the commonly used Fock states description of the radiation field. Compared to the other quasi-classical descriptions of the photon field, such as the classical Wigner model, the RP representation provides a much more accurate description of the polaritonic quantum dynamics, because it properly preserves the quantum distribution of the photonic DOF throughout the quantum dynamics propagation of the molecule-cavity hybrid system, whereas the classical Wigner model fails to do so. This work demonstrates the possibility of using the ring-polymer description to treat the quantized radiation field in polariton chemistry, offering an accurate and efficient approach for future investigations in cavity quantum electrodynamics.

Investigate New Reactivities Enabled by Polariton Photochemistry

2019 ◽  
Author(s):  
Arkajit Mandal ◽  
Pengfei Huo
Keyword(s):  
Excited State ◽  
Quantum Electrodynamics ◽  
Quantum Dynamics ◽  
Optical Cavity ◽  
Cavity Quantum Electrodynamics ◽  
Photochemical Reactions ◽  
Isomerization Reaction ◽  
Resonance Case ◽  
Radiation Mode ◽  
Dynamics Simulations

We perform quantum dynamics simulations to investigate new chemical reactivities enabled by cavity quantum electrodynamics. The quantum light-matter interactions between the molecule and the quantized radiation mode inside an optical cavity create a set of hybridized electronic-photonic states, so-called polaritons. The polaritonic states adapt the curvatures from both the ground and the excited electronic states, opening up new possibilities to control photochemical reactions by exploiting intrinsic quantum behaviors of light-matter interactions. With direct quantum dynamics simulations, we demonstrate that the selectivity of a model photo-isomerization reaction can be controlled by tuning the photon frequency of the cavity mode or the light-matter coupling strength, providing new ways to manipulate chemical reactions via light-matter interaction. We further investigate collective quantum effects enabled by coupling quantized radiation mode to multiple molecules. Our results suggest that in the resonance case, a photon is recycled among molecules to enable multiple excited state reactions, thus effectively functioning as a catalyst. In the non-resonance case, molecules emit and absorb virtual photons to initiate excited state reactions through fundamental quantum electrodynamics processes. These results from direct quantum dynamics simulations reveal basic principles of polariton photochemistry as well as promising reactivities that take advantage of intrinsic quantum behaviors of photons.

scholarly journals Mode-Selective Chemistry through Polaritonic Vibrational Strong Coupling

2021 ◽  
Author(s):  
Xinyang Li ◽  
Arkajit Mandal ◽  
Pengfei Huo
Keyword(s):  
Quantum Electrodynamics ◽  
Optical Cavity ◽  
Cavity Quantum Electrodynamics ◽  
Reaction Coordinate ◽  
Vacuum Fluctuations ◽  
Radiation Mode ◽  
Competitive Reactions ◽  
Photon Frequency ◽  
Theoretical Results ◽  
Fundamental Mechanism

Recent experiments have demonstrated remarkable mode-selective reactivities by coupling molecular vibrations with vacuum fluctuations inside an optical cavity. The fundamental mechanism behind such effects, on the other hand, remains elusive. In this work, we theoretically demonstrate the basic principle of how cavity photon frequency can be tuned to achieve mode-selective reactivities. We find that the non-Markovian nature of the radiation mode leads to a cavity frequency-dependent dynamical caging effect of a reaction coordinate, resulting in a suppression of the rate constant. In the presence of multiple competitive reactions, it is possible to preferentially cage a reaction coordinate when the barrier frequencies for competing reaction paths are different. Our theoretical results illustrate the cavity-induced mode-selective chemistry through polaritonic vibrational-strong couplings, revealing the fundamental mechanism for changing chemical selectivities through cavity quantum electrodynamics.

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