Title :

Sensing electromagnetic fields with the AC-Stark effect in two-photon spectroscopy of cold trapped HD+

Author(s) :

Constantin, Florin Lucian [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]

Conference title :

SPIE Photonics Europe,

City :

Strasbourg

Country :

France

Start date of the conference :

2020-04-06

Book title :

Proc. SPIE

Publisher :

SPIE

English keyword(s) :

cold trapped ions
hydrogen molecular ions
electrometry
two-photon spectroscopy
ac-Stark shift
dynamic polarizability
polarization ellipse
reference frames

HAL domain(s) :

Physique [physics]/Physique Quantique [quant-ph]

English abstract : [en]

This contribution evaluates the potential for SI-traceable measurements of electromagnetic fields from precision measurements of two-photon rovibrational transitions of cold trapped HD+ ions interpreted with accurate ...
Show more >This contribution evaluates the potential for SI-traceable measurements of electromagnetic fields from precision measurements of two-photon rovibrational transitions of cold trapped HD+ ions interpreted with accurate theoretical models. Zeeman spectroscopy of a hyperfine component of the (v,L)=(0,0)→(2,2) two-photon transition is exploited for the measurement of a static magnetic field. The absolute sensitivity and accuracy is estimated at the 10^(-10) T level in the case of frequency measurements at the quantum projection noise limit. Measurements of the AC-Stark shifts of different Zeeman components of the (v,L)=(0,0)→(2,0) two-photon transition at different orientations of the magnetic field are exploited to measure the polarisation and the intensity of a THz-wave off-resonantly coupled to HD+ rotational levels. The sensitivity is estimated at the 10^(-7) W/m^2 level. A reference THz-wave with an intensity of 1 W/m^2 can be calibrated in intensity with a fractional accuracy limited at the 10^(-2) level by the accuracy of the theoretical calculations and at the 10^(-4) level by the experimental errors. In addition, an approach for retrieval of the full polarisation ellipse is demonstrated with a selected THz-wave. The fractional accuracy of the calibration is better than 5% for the amplitudes and better than 10% for the phases of the electric field components of the THz-wave.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL