CARS Microspectroscopic System
Multiplex CARS Microspectroscopic System
- Coherent Anti-Stokes Raman Scattering (CARS)
- Boost a week Raman signal
Coherent and highly directional signal emission
One-photon fluorescence free detection
Super spatial-resolution due to the nonlienar optical process - Multiplex CARS process
- Narrow-band pump (ω1, Fig. 1. red) and broad-band Stokes (ω2, Fig. 1. gray) lasers drive a multiple vibrational coherences
→ CARS spectrum(Fig. 1. orange) in the range from the fingerprint to the C-H or O-H stretch region is obtained simultaneously
Fig. 1. Multiplex CARS process
Experimental Setup
Supercontinuum generation by a photonic crystal fiber → Ultrabroadband Stokes laser source
Fig. 2. Setup
Fig. 3. Supercontinuum generation
Fig. 4. The experimental setup
CARS Spectrum and Images of a Single Pollen Grain
Fig. 5. CARS spectrum (sample: cherry blossom)
Fig. 6. CARS images; C-H str. region (left red), C=C Str. region (middle yellow), C-C str. region (right blue)
References
- H. Kano and H. Hamaguchi, Chem. Lett. 35, 1124 (2006)
- Opt. Express 14, 2798 (2006)
- J. Chem. Phys. B 110, 3130 (2005)
- J. Raman Spectrosc. 37, 411 (2005)
- Opt. Express 13, 1322 (2005)
- Appl. Phys. Lett. 86, 121113 (2005)
- Appl. Phys. B, 80, 243 (2005)
- Appl. Phys. Lett. 85, 4298 (2004)
- Opt. Lett., 28, 2860 (2003).