Observation of the inverse Lamb dip for infrared-microwave two-photon transitions

15 July 1972

journal article
research article
Published by AIP Publishing in Applied Physics Letters

Vol. 21 (2) , 60-62
https://doi.org/10.1063/1.1654279

Abstract

An inverse Lamb dip has been observed for infrared‐microwave two‐photon transitions in ¹⁴NH₃ and ¹⁵NH₃. The signal was sufficiently strong to be observed on an oscilloscope with a detector time constant of 3 msec. The observations establish a method of measuring differences between laser frequencies and molecular absorption frequencies with high accuracy even if this absorption is outside of the tuning range of the laser lines. A double resonance experiment involving the two‐photon inverse Lamb dip has also been conducted.

Keywords

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