Abstract
We propose a method based on the electromagnetically induced transparency (EIT) phenomenon for the detection of molecules which exist as a small minority in the presence of a majority of absorbers. The EIT effect we employ effectively eliminates the absorption of the majority species in the spectral region where it overlaps with the absorption of the minority species. The method can also be used to enhance local-modes transitions which overlap spectrally with a background of other local-modes transitions of the same molecule. The general theory is applied to the case of sparse and congested background spectra within the same molecule and to the recording of the spectra of isotopomers (of chlorine and methanol) that are in minority relative to other isotopomers which constitute the majority of molecules present.
| Original language | English |
|---|---|
| Article number | 064201 |
| Journal | Journal of Chemical Physics |
| Volume | 136 |
| Issue number | 6 |
| DOIs | |
| State | Published - 14 Feb 2012 |
| Externally published | Yes |
Bibliographical note
Funding Information:This work was supported by Defense Threat Reduction Agency (DTRA), USA, Natural Sciences and Engineering Research Council, Canada (NSERC), and by a major thematic grant of University of British Columbia (UBC’s) Peter Wall Institute for Advanced Studies.
Funding
This work was supported by Defense Threat Reduction Agency (DTRA), USA, Natural Sciences and Engineering Research Council, Canada (NSERC), and by a major thematic grant of University of British Columbia (UBC’s) Peter Wall Institute for Advanced Studies.
| Funders | Funder number |
|---|---|
| Defense Threat Reduction Agency | |
| Natural Sciences and Engineering Research Council of Canada | |
| University of British Columbia |