scholarly journals Self-Dissociation of Polar Molecules in a Confined Infrared Vacuum

2020 ◽  
Author(s):  
Johan Triana ◽  
Felipe Herrera
Keyword(s):  
Cavity Mode ◽  
Single Mode ◽  
Vacuum Field ◽  
Fundamental Vibration ◽  
Ir Sources ◽  
Cw Laser ◽  
Resonant Laser ◽  
Single Cavity ◽  
Single Mode Cavity ◽  
Single Cavity Mode

<p>We study the infrared photodissociation dynamics of a single hydrogen fluoride (HF) molecule in a single-mode cavity vacuum, and compare it with the case of strong cw laser driving. We show that in the absence of additional IR sources, a single cavity mode can efficiently dissociate a polar diatomic molecule prepared in the ground vibrational level. We predict dissociation probabilities of up to 20%, for a vacuum field that is resonant with the fundamental vibration frequency at the onset of the ultrastrong coupling regime. In contrast, similar dissociation rates can only be achieved in free space using resonant laser fields with intensities not smaller than 10<sup>14</sup> W/cm<sup>2</sup>. Our work highlights the fundamental differences that can be expected for reactive dynamical processes inside infrared cavities.</p>

scholarly journals Self-Dissociation of Polar Molecules in a Confined Infrared Vacuum

2020 ◽  
Author(s):  
Johan Triana ◽  
Felipe Herrera
Keyword(s):  
Cavity Mode ◽  
Single Mode ◽  
Vacuum Field ◽  
Fundamental Vibration ◽  
Ir Sources ◽  
Cw Laser ◽  
Resonant Laser ◽  
Single Cavity ◽  
Single Mode Cavity ◽  
Single Cavity Mode

<p>We study the infrared photodissociation dynamics of a single hydrogen fluoride (HF) molecule in a single-mode cavity vacuum, and compare it with the case of strong cw laser driving. We show that in the absence of additional IR sources, a single cavity mode can efficiently dissociate a polar diatomic molecule prepared in the ground vibrational level. We predict dissociation probabilities of up to 20%, for a vacuum field that is resonant with the fundamental vibration frequency at the onset of the ultrastrong coupling regime. In contrast, similar dissociation rates can only be achieved in free space using resonant laser fields with intensities not smaller than 10<sup>14</sup> W/cm<sup>2</sup>. Our work highlights the fundamental differences that can be expected for reactive dynamical processes inside infrared cavities.</p>

Single-mode laser fluorescence of NO2 excited at 488 nm

1981 ◽  
Vol 59 (4) ◽  
pp. 559-566 ◽  
Author(s):  
M. J. Armstrong ◽  
J. C. D. Brand ◽  
C. di Lauro
Keyword(s):  
Intensity Distribution ◽  
Ground State ◽  
Cavity Mode ◽  
Single Mode ◽  
Laser Fluorescence ◽  
Mode Laser ◽  
Single Mode Laser ◽  
Vibrational Levels ◽  
Single Cavity ◽  
Single Cavity Mode

The 488 nm line of the Ar+ laser operated in a single cavity mode excites absorption–fluorescence cycles in which an unusually high proportion exhibit anomalies in the selection rules, including transitions to a1 vibrational levels with values of ΔK = Kinitial – Kfinal of 4,2,0, and −2. Many transitions in the fluorescence, especially the weaker bands, show an intensity distribution different from that expected for type A bands of a 2B2–2A1 transition; this is attributed to interference between the dominant μa moment and a secondary, perpendicular transition moment considered to result from a perturbation of the intermediate state of the cycle by the 2B1 state.Data from about 20 fluorescence bands are used to determine the coefficient of a sextic anharmonic resonance, ν1ν2ν3, ν1, − 3, ν2 + 1, ν3 + 2 in the ground state of NO2.

Determining the state of a single cavity mode from photon statistics

1997 ◽  
Vol 44 (11-12) ◽  
pp. 2427-2439 ◽  
Author(s):  
K. Jacobs ◽  
P. L. Knight ◽  
V. Vedral
Keyword(s):  
Cavity Mode ◽  
The State ◽  
Photon Statistics ◽  
Single Cavity ◽  
Single Cavity Mode

Linewidth Stabilization of Semiconductor Lasers in an External Cavity

1984 ◽  
Vol 5 (2) ◽  
Author(s):  
C. J. Nielsen ◽  
J. H. Osmundsen
Keyword(s):  
Semiconductor Laser ◽  
Semiconductor Lasers ◽  
Cavity Mode ◽  
External Cavity ◽  
Frequency Stabilization ◽  
Control Loop ◽  
Mean Frequency ◽  
Mode Operation ◽  
Single Cavity ◽  
Single Cavity Mode

SummaryAn automatic linewidth control loop which provides stable optimum linewidth reduction and single cavity mode operation of an external cavity semiconductor laser is presented. Stable linewidth reduction from 70 MHz to below 2 MHz is obtained for a 1.3 μm BH-laser, whereas simultaneous mean frequency stabilization to within 1 kHz and linewidth reduction from 17 MHz to 1.6 MHz is demonstrated for an 830 nm CSP-laser.

Dual-comb Generation from a Simple Single-cavity Mode-locked Bulk Laser

2020 ◽  
Author(s):  
Maciej Kowalczyk ◽  
Łukasz Sterczewski ◽  
Xuzhao Zhang ◽  
Valentin Petrov ◽  
Shiyi Guo ◽  
...  
Keyword(s):  
Cavity Mode ◽  
Comb Generation ◽  
Single Cavity ◽  
Single Cavity Mode

scholarly journals Quantum Trajectories for Squeezed Input Processes: Explicit Solutions

2016 ◽  
Vol 23 (01) ◽  
pp. 1650004
Author(s):  
Anita Dabrowska ◽  
John Gough
Keyword(s):  
Cavity Mode ◽  
Characteristic Functions ◽  
Gaussian State ◽  
Quantum Trajectories ◽  
Explicit Solutions ◽  
A Posteriori ◽  
Single Cavity ◽  
Single Cavity Mode

We consider the quantum (trajectories) filtering equation for the case when the system is driven by Bose field inputs prepared in an arbitrary non-zero mean Gaussian state. The a posteriori evolution of the system is conditioned by the results of a single or double homodyne measurements. The system interacting with the Bose field is a single cavity mode taken initially in a Gaussian state. We show explicit solutions using the method of characteristic functions to the filtering equations exploiting the linear Gaussian nature of the problem.

scholarly journals Thermodynamics of ultrastrongly coupled light-matter systems

Quantum ◽  
2020 ◽  
Vol 4 ◽  
pp. 335 ◽  
Author(s):  
Philipp Pilar ◽  
Daniele De Bernardis ◽  
Peter Rabl
Keyword(s):  
Cavity Mode ◽  
Black Body ◽  
Significant Shift ◽  
Thermodynamic Quantities ◽  
Fundamental Interest ◽  
Ferroelectric Phase Transition Temperature ◽  
Potential Applications ◽  
Electric Susceptibility ◽  
Single Cavity ◽  
Single Cavity Mode

We study the thermodynamic properties of a system of two-level dipoles that are coupled ultrastrongly to a single cavity mode. By using exact numerical and approximate analytical methods, we evaluate the free energy of this system at arbitrary interaction strengths and discuss strong-coupling modifications of derivative quantities such as the specific heat or the electric susceptibility. From this analysis we identify the lowest-order cavity-induced corrections to those quantities in the collective ultrastrong coupling regime and show that for even stronger interactions the presence of a single cavity mode can strongly modify extensive thermodynamic quantities of a large ensemble of dipoles. In this non-perturbative coupling regime we also observe a significant shift of the ferroelectric phase transition temperature and a characteristic broadening and collapse of the black-body spectrum of the cavity mode. Apart from a purely fundamental interest, these general insights will be important for identifying potential applications of ultrastrong-coupling effects, for example, in the field of quantum chemistry or for realizing quantum thermal machines.

Exakte Behandlung eines Maser-Modells

1964 ◽  
Vol 19 (7-8) ◽  
pp. 857-861 ◽  
Author(s):  
E. Abate ◽  
H. Haken
Keyword(s):  
Time Variation ◽  
Cavity Mode ◽  
Photon Number ◽  
Transition Frequency ◽  
Approximate Methods ◽  
Machine Calculation ◽  
Single Cavity ◽  
Equations Of Motions ◽  
Single Cavity Mode

We treat the interaction of a single cavity mode with a system of atoms, all with the same transition frequency which is assumed equal to the frequency of the mode. The mode and the atoms are assumed to have infinite lifetime, when not coupled together. By a machine calculation the time variation of the number of photons is determined, taking into account up to 80 atoms. The photon number oscillates as a function of time. The results are compared with those of approximate methods used by SERBER and TOWNES and FRISCH and HAKEN. Finally a new semiclassical treatment of the equations of motions is given, which is capable of showing the oscillations of the photon number.

scholarly journals Controlling Nanoantenna Polarizability through Backaction via a Single Cavity Mode

2018 ◽  
Vol 120 (20) ◽  
Author(s):  
Freek Ruesink ◽  
Hugo M. Doeleman ◽  
Ewold Verhagen ◽  
A. Femius Koenderink
Keyword(s):  
Cavity Mode ◽  
Single Cavity ◽  
Single Cavity Mode
Sign in / Sign up

Export Citation Format

Share Document