400 citations · 1.3k across the 21 of their papers we have counts for
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Polarization-dependent Intensity Ratios in Double Resonance Spectroscopy
Kevin K. Lehmann
Double Resonance is a powerful method spectroscopic method that provides an unambiguous assignment of the rigorous quantum numbers of one state of a transition. However, there is o…
Sub-Doppler optical-optical double-resonance spectroscopy using a cavity-enhanced frequency comb probe
Vinicius Silva de Oliveira, Isak Silander, Lucile Rutkowski +4
Accurate parameters of molecular hot-band transitions, i.e., those starting from vibrationally excited levels, are needed to accurately model high-temperature spectra in astrophysi…
Resonance enhanced two-photon cavity ring-down spectroscopy of vibrational overtone bands: a proposal
Kevin K. Lehmann
This paper presents an analysis of near-resonant, ro-vibrational two-photon spectroscopy and the use of cavity ring-down spectroscopy for its detection. Expressions are derived for…
Influence Spatial Degeneracy on Rotational Spectroscopy Three Wave Mixing and enantiomeric state separation of Chiral Molecules
Kevin K. Lehmann
Pulse flip angles are calculated for three wave mixing, three state cycles of chiral molecules to produce optimized free induction decay amplitudes proportional to the enantiomeric…
Stark Field Modulated Microwave Detection of Molecular Chirality
Kevin K. Lehmann
Patterson, Schnell, \& Doyle, {\it Nature} {\bf 497}, 475 (2013) introduced a microwave experiment that produces a perpendicularly polarized molecular emission when chiral molecule…
Proposal for Chiral Detection by the AC Stark-Effect
Kevin K. Lehmann
Recently, two related three wave mixing experiments have been demonstrated that use allowed rotational transitions to produce a free induction decay signal with an amplitude linear…
Spectroscopy and dynamics in helium nanodroplets
Frank Stienkemeier, Kevin K Lehmann
This article provides a review of recent work in the field of helium nanodroplet spectroscopy with emphasis on the dynamical aspects of the interactions between molecules in helium…
UV spectra of benzene isotopomers and dimers in helium nanodroplets
Roman Schmied, Pierre Carcabal, Adriaan M. Dokter +3
We report spectra of various benzene isotopomers and their dimers in helium nanodroplets in the region of the first Herzberg-Teller allowed vibronic transition 610 1B2u<-1A1g (the…
Computer-generated character tables and nuclear spin statistical weights: Application to benzene dimer and methane dimer
Roman Schmied, Kevin K. Lehmann
A short GAP computer program is presented for computing nuclear spin statistical weights of rovibronic symmetry species in polyatomic molecules. As examples, benzene dimer and meth…
Evaporative Cooling of Helium Nanodroplets with Angular Momentum Conservation
Kevin K. Lehmann, Adriaan M. Dokter
Evaporative cooling of helium nanodroplets is studied with a statistical rate model that includes, for the first time, angular momentum conservation as a constraint on the accessib…
Bias in the temperature of helium nanodroplets measured by an embedded rotor
Kevin K. Lehmann
The ro--vibrational spectra of molecules dissolved in liquid He nanodroplets display rotational structure. Where resolved, this structure has been used to determine a temperatu…
Microcanonical Thermodynamic Properties of Helium Nanodroplets
Kevin K. Lehmann
The density of states and other thermodynamic functions of helium nanodroplets are calculated for a microcanonical ensemble with both energy and total angular momentum treated as c…
Helium nanodroplet isolation ro-vibrational spectroscopy: methods and recent results
Carlo Callegari, Kevin K. Lehmann, Roman Schmied +1
In this article, recent developments in HElium NanoDroplet Isolation (HENDI) spectroscopy are reviewed, with an emphasis on the infrared region of the spectrum. Topics discussed in…
Quantum Hydrodynamic Model for the enhanced moments of Inertia of molecules in Helium Nanodroplets: Application to SF
Kevin K. Lehmann, Carlo Callegari
The increase in moment of inertia of SF in helium nanodroplets is calculated using the quantum hydrodynamic approach. This required an extension of the numerical solution to th…
Calculation of hydrodynamic mass for atomic impurities in helium
Kevin K. Lehmann
We present a simple numerical procedure for calculating the irrotational hydrodynamic flow in a helium solvation structure around a spherical solute in linear motion through superf…
Rotation in liquid He: Lessons from a toy model
Kevin K. Lehmann
This paper presents an analysis of a model problem, consisting of two interacting rigid rings, for the rotation of molecules in liquid He. Due to Bose symmetry, the excitation…
Potential of a neutral impurity in a large He clusters
Kevin K. Lehmann
This paper presents an analysis of the motion of an neutral impurity species in a nanometer scale He cluster, extending a previous study of the dynamics of an ionic impurity. I…
Potential of an ionic impurityin a large He cluster
Kevin K. Lehmann, Jan A. Northby
This paper presents an analysis of the motion of an impurity ion in a nanometer scale He cluster. Due to induction forces, ions are strongly localized near the center of the cl…