Optical hole burning and spectral diffusion in ruby

Pulsed ultrasound-modulated optical tomography using spectral-hole burning as a narrowband spectral filter.

We applied a submegahertz nonlinear optical filter afforded by a cryogenically cooled spectral-hole burning crystal to ultrasound-modulated optical tomography. Our experimental results show that this technique, having the largest etendue among all available ultrasound-modulated optical tomography techniques and being immune to speckle decorrelation, offers potential for imaging in vivo and form...

Spectral hole burning and selection of conformational substates in chromoproteins.

We investigated spectral holes burnt at 1.5 K into the origins of several tautomeric forms of mesoporphyrin IX-substituted horseradish peroxidase at pH 8 under pressures up to 2 MPa. From the pressure-induced lineshift the compressibility of the apoprotein could be determined. We found that the compressibility changed significantly when measured at different tautomer origins. It was concluded t...

Spectral diffusion in glasses under high pressure: A study by time-resolved hole-burning

We have studied optical dephasing and spectral diffusion of the S1←S0 0–0 transition of bacteriochlorophyll-a (BChl-a) in the glass 2-methyltetrahydrofuran ~MTHF! at ambient (Dp 50) and high pressure (Dp53.6 GPa) between 1.2 and 4.2 K by time-resolved hole-burning. The ‘‘effective’’ homogeneous linewidth Ghom 8 follows a power law dependence on temperature, Ghom 8 5G081aT , where G085G01G0 1G0 ...

Spectral hole burning and its application in microwave photonics

Spectral hole burning, used in inhomogeneously broadened emitters, is a well-established optical1 technique, with applications from spectroscopy to slow light2 and frequency combs3. In microwave photonics4, electron spin ensembles5,6 are candidates for use as quantum memories7 with potentially long storage times8. Here, we demonstrate long-lived collective dark states9 by spectral hole burning ...

Optical delay with spectral hole burning in Doppler broadened cesium vapor