Abstract
| Original language | English |
|---|---|
| Article number | 023825 |
| Number of pages | 11 |
| Journal | Physical review A: Atomic, molecular, and optical physics |
| Volume | 86 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 16 Aug 2012 |
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Ground-state depletion for subdiffraction-limited spatial resolution in coherent anti-Stokes Raman scattering microscopy. / Cleff, Carsten; Groß, Petra; Fallnich, C.; Offerhaus, Herman L.; Herek, Jennifer L.; Kruse, Kai; Beeker, Willem P.; Lee, Chris J.; Boller, Klaus-Jochen.
In: Physical review A: Atomic, molecular, and optical physics, Vol. 86, No. 2, 023825, 16.08.2012.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Ground-state depletion for subdiffraction-limited spatial resolution in coherent anti-Stokes Raman scattering microscopy
AU - Cleff, Carsten
AU - Groß, Petra
AU - Fallnich, C.
AU - Offerhaus, Herman L.
AU - Herek, Jennifer L.
AU - Kruse, Kai
AU - Beeker, Willem P.
AU - Lee, Chris J.
AU - Boller, Klaus-Jochen
PY - 2012/8/16
Y1 - 2012/8/16
N2 - We theoretically investigate ground-state depletion for subdiffraction-limited spatial resolution in coherent anti-Stokes Raman scattering (CARS) microscopy. We propose a scheme based on ground-state depopulation, which is achieved via a control laser light field incident prior to the CARS excitation light fields. This ground-state depopulation results in a reduced CARS signal generation. With an appropriate choice of spatial beam profiles, the scheme can be used to increase the spatial resolution. Based on the density matrix formalism we calculate the CARS signal generation and find a CARS signal suppression by 75% due to ground-state depletion with a single control light field and by using two control light fields the CARS signal suppression can be enhanced to 94%. Additional control light fields will enhance the CARS suppression even further. In case of a single control light field we calculate resulting CARS images using a computer-generated test image including quantum and detector noise and show that the background from the limited CARS suppression can be removed by calculating difference images, yielding subdiffraction-limited resolution where the resolution achievable depends only on the intensity used.
AB - We theoretically investigate ground-state depletion for subdiffraction-limited spatial resolution in coherent anti-Stokes Raman scattering (CARS) microscopy. We propose a scheme based on ground-state depopulation, which is achieved via a control laser light field incident prior to the CARS excitation light fields. This ground-state depopulation results in a reduced CARS signal generation. With an appropriate choice of spatial beam profiles, the scheme can be used to increase the spatial resolution. Based on the density matrix formalism we calculate the CARS signal generation and find a CARS signal suppression by 75% due to ground-state depletion with a single control light field and by using two control light fields the CARS signal suppression can be enhanced to 94%. Additional control light fields will enhance the CARS suppression even further. In case of a single control light field we calculate resulting CARS images using a computer-generated test image including quantum and detector noise and show that the background from the limited CARS suppression can be removed by calculating difference images, yielding subdiffraction-limited resolution where the resolution achievable depends only on the intensity used.
U2 - 10.1103/PhysRevA.86.023825
DO - 10.1103/PhysRevA.86.023825
M3 - Article
VL - 86
JO - Physical review A : atomic, molecular, and optical physics and quantum information
JF - Physical review A : atomic, molecular, and optical physics and quantum information
SN - 2469-9926
IS - 2
M1 - 023825
ER -