palastro_2016

J. P. Palastro, J. Penano, L. A. Johnson, B. Hafizi, J. K. Wahlstrand and H. M. Milchberg, “Two-photon vibrational excitation of air by long-wave infrared laser pulses”, Phys. Rev. A 94, 023816 (2016)

Source record · Catalogue · Review register

DOI: 10.1103/PhysRevA.94.023816

Source kind: theory

Recorded technique: Simulations and analytic theory of long-wave infrared (8.4 or 12.6 um, near half the vibrational frequency of N2 or O2) ultrashort-pulse propagation in air with electronic, rotational and vibrational (two-photon resonant) responses from density-matrix theory (secs. II-IV).

Materials in structured entries: N2, O2

Dataset quantities: nonlinear_index, polarizability_anisotropy

Contents: 4 datasets; 0 formulas.

Curation notes

Journal pages 023816-1 to -7 = PDF pages 1-7; the library copy is marked ‘published 5 August 2016; corrected 28 December 2017’ (the corrected version). Identity checked against the first page. Air (0.8 N2 + 0.2 O2) is the medium; the N2 and O2 parameters of Table I are taken.

DEFINITIONS (SI; p. 2): P_e = eps0 chi_e E, ‘chi_e = 4 c eps0 n2 E^2 / 3’ (Eq. (1)), E the real transverse field (so with E = E_hat sin(omega t) the cycle-averaged index change is n2 (c eps0 E_hat^2 / 2) = n2 I: n2 is the self coefficient); rotational Eq. (2), vibrational Eq. (3): (d^2/dt^2 + Omega_v^2) chi_v = (4 pi^2 eps0 eta / mu)(d alpha/dQ)^2 E^2 (eta the number density, mu the reduced mass, d alpha/dQ the isotropic polarizability derivative). Refractive limit, Eq. (11): <chi_v> = gamma E_hat^2 / 2 Omega_v^2 + ...

TABLE I (p. 2; CSV and image checked; tools/extract/palastro_2016.py): N2, O2: fraction 0.8, 0.2; n2 (m2/W) 7.3e-24, 9.3e-24 ‘[6,16]’; Omega_v (s^-1) 4.5e14, 3.0e14 ‘[12]’; I_M (J s2) 1.46e-46, 1.9e-46 ‘[4]’; Delta a (m3) 6.7e-31, 10.2e-31 ‘[6]’; mu (kg) 1.2e-26, 1.3e-26; d a/dQ (m2) 1.75e-20, 1.46e-20 ‘[20]’. Only n2 and Delta a are extracted (no quantity for the others). The n2 are ‘adjusted in Table I to only include the electronic contribution n2 -> n2 - (3 pi^2 eta / c Omega_v^2 mu)(d alpha/dQ)^2’ from ‘the n2 values measured in Refs. [7,17], which include both the electronic and the vibrational contributions’ (p. 3) = wahlstrand_2012 and zahedpour_2015. REFERENCE NUMBERS: Table I’s ‘[6,16]’ and ‘[6]’ do not match that text: [6] is Palastro, Antonsen and Pearson 2011 (palastro_2011, which gives no Delta alpha) and [16] Mitrofanov et al. 2015; the values (Delta a 6.7 and 10.2 x 1e-31 m3 = wahlstrand_2012’s 6.7, 10.2 x 1e-25 cm3) show that [7] and [17] are meant (an off-by-one after the correction; [12] for Omega_v, = wahlstrand_2015 on H2 and D2, is likely [13] Demtroder, and [4] for I_M is Lin et al.). reproduced_from names the sources of the values. The reference state of n2 is not stated (that of the sources, 1 atm).

Recorded bibliographic identity status: VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents.

Datasets

palastro_2016/n2_N2

{
  "id": "n2_N2",
  "material": "N2",
  "file": "N2/palastro_2016__n2_N2.csv",
  "table": "tbl_8f0115c294cd",
  "quantity": "nonlinear_index",
  "unit": "m2/W",
  "scale": 1e-24,
  "abscissa_unit": "nm",
  "state": {
    "pressure_pa": 101325.0,
    "temperature_k": 293.15
  },
  "use": "reproduced",
  "reproduced_from": [
    "wahlstrand_2012",
    "zahedpour_2015"
  ],
  "parameters": {
    "part": "electronic",
    "coefficient": "self"
  }
}

Table I, n2 = 7.3e-24 m2/W: the measured n2 (wahlstrand_2012 7.4, zahedpour_2015 7.9 x 1e-20 cm2/W at 800 nm) with the adiabatic vibrational part subtracted (p. 3): reproduced and rescaled. Recorded at the sources’ 800 nm and 1 atm (293.15 K assumed); the paper uses it frequency-independently at 8.4-12.6 um.

palastro_2016/n2_O2

{
  "id": "n2_O2",
  "material": "O2",
  "file": "O2/palastro_2016__n2_O2.csv",
  "table": "tbl_8f0115c294cd",
  "quantity": "nonlinear_index",
  "unit": "m2/W",
  "scale": 1e-24,
  "abscissa_unit": "nm",
  "state": {
    "pressure_pa": 101325.0,
    "temperature_k": 293.15
  },
  "use": "reproduced",
  "reproduced_from": [
    "wahlstrand_2012",
    "zahedpour_2015"
  ],
  "parameters": {
    "part": "electronic",
    "coefficient": "self"
  }
}

Table I, n2 = 9.3e-24 m2/W: as n2_N2 (sources 9.5 and 8.1 x 1e-20 cm2/W at 800 nm), vibrational part subtracted.

palastro_2016/dalpha_N2

{
  "id": "dalpha_N2",
  "material": "N2",
  "file": "N2/palastro_2016__dalpha_N2.csv",
  "table": "tbl_8f0115c294cd",
  "quantity": "polarizability_anisotropy",
  "unit": "cm3",
  "scale": 1e-25,
  "abscissa_unit": "nm",
  "use": "reproduced",
  "reproduced_from": [
    "wahlstrand_2012"
  ]
}

Table I, Delta a = 6.7 x 10^-31 m3 (= 6.7 x 1e-25 cm3; scale set so), wahlstrand_2012’s value (the printed reference [6] is off by one, source notes).

palastro_2016/dalpha_O2

{
  "id": "dalpha_O2",
  "material": "O2",
  "file": "O2/palastro_2016__dalpha_O2.csv",
  "table": "tbl_8f0115c294cd",
  "quantity": "polarizability_anisotropy",
  "unit": "cm3",
  "scale": 1e-25,
  "abscissa_unit": "nm",
  "use": "reproduced",
  "reproduced_from": [
    "wahlstrand_2012"
  ]
}

Table I, Delta a = 10.2 x 10^-31 m3 (= 10.2 x 1e-25 cm3), wahlstrand_2012’s value.

Formulas

No formulas are recorded.

Corrections

No dataset errata are recorded in this source record.

Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the review register for the checks and decisions.