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Showing 1 to 12 of 209 entries
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Laser waveform control of extreme ultraviolet high harmonics from solids.

Optics letters

You YS, Wu M, Yin Y, Chew A, Ren X, Gholam-Mirzaei S, Browne DA, Chini M, Chang Z, Schafer KJ, Gaarde MB, Ghimire S.
PMID: 28454168
Opt Lett. 2017 May 01;42(9):1816-1819. doi: 10.1364/OL.42.001816.

Solid-state high-harmonic sources offer the possibility of compact, high-repetition-rate attosecond light emitters. However, the time structure of high harmonics must be characterized at the sub-cycle level. We use strong two-cycle laser pulses to directly control the time-dependent nonlinear current...

Mechanism by which noninhibitory concentrations of glucose increase inhibitory activity ofp-coumaric acid on morning-glory seedling biomass accumulation.

Journal of chemical ecology

Pue KJ, Blum U, Gerig TM, Shafer SR.
PMID: 24234321
J Chem Ecol. 1995 Jun;21(6):833-47. doi: 10.1007/BF02033464.

Noninhibitory levels of glucose-C [≤ 72 µg carbon (C)/g soil] increased the inhibitory activity ofp-coumaric acid on morning-glory seedling biomass accumulation in Cecil Bt-horizon soil. The amount ofp-coumaric acid required for a given level of inhibition of shoot and...

Strong species dependence of high order photoelectron production in alkali metal atoms.

Physical review letters

Gaarde MB, Schafer KJ, Kulander KC, Sheehy B, Kim D, DiMauro LF.
PMID: 11018951
Phys Rev Lett. 2000 Mar 27;84(13):2822-5. doi: 10.1103/PhysRevLett.84.2822.

We present a theoretical and experimental study of the production of very high order photoelectrons from alkali metal atoms interacting with intense, midinfrared radiation. The strength of this process shows an unexpectedly strong species dependence. We find that this...

Synthesis of new two-photon absorbing fluorene derivatives via Cu-mediated Ullmann condensations.

The Journal of organic chemistry

Belfield KD, Schafer KJ, Mourad W, Reinhardt BA.
PMID: 10959847
J Org Chem. 2000 Jul 28;65(15):4475-81. doi: 10.1021/jo991950+.

The Ullmann amination reaction was utilized to provide access to a number of fluorene analogues from common intermediates, via facile functionalization at positions 2, 7, and 9 of the fluorene ring. Through variation of amine or iodofluorene derivative, analogues...

Amplitude and phase control of attosecond light pulses.

Physical review letters

López-Martens R, Varjú K, Johnsson P, Mauritsson J, Mairesse Y, Salières P, Gaarde MB, Schafer KJ, Persson A, Svanberg S, Wahlström CG, L'huillier A.
PMID: 15698258
Phys Rev Lett. 2005 Jan 28;94(3):033001. doi: 10.1103/PhysRevLett.94.033001. Epub 2005 Jan 26.

We report the generation, compression, and delivery on target of ultrashort extreme-ultraviolet light pulses using external amplitude and phase control. Broadband harmonic radiation is first generated by focusing an infrared laser with a carefully chosen intensity into a gas...

One- and two-photon fluorescence anisotropy of selected fluorene derivatives.

Journal of fluorescence

Belfield KD, Bondar MV, Hales JM, Morales AR, Przhonska OV, Schafer KJ.
PMID: 15711871
J Fluoresc. 2005 Jan;15(1):3-11. doi: 10.1007/s10895-005-0207-9.

The steady-state excitation anisotropy spectra of fluorene derivatives were measured in viscous solvents, under the one- and two-photon excitation, over a broad spectral range (UV-Visible). The orientation of their absorption transition moments for the first, S0 --> S1, and...

SOLUTIONS OF CHLOROPHYLL IN SALT WATER.

Science (New York, N.Y.)

Shafer J.
PMID: 17758850
Science. 1940 Jun 14;91(2372):580. doi: 10.1126/science.91.2372.580.

No abstract available.

An exploratory study of the usefulness of a battery of psychological tests with nursery school children.

The American journal of psychiatry

SCHAFER S, LEITCH M.
PMID: 18913433
Am J Psychiatry. 1948 Apr;104(10):647-52. doi: 10.1176/ajp.104.10.647.

No abstract available.

Notice of retraction.

Anesthesia and analgesia

Shafer SL.
PMID: 19448229
Anesth Analg. 2009 Jun;108(6):1953. doi: 10.1213/01.ane.0000351544.23942.33.

No abstract available.

Notice of retraction.

Anesthesia and analgesia

Shafer SL.
PMID: 21106975
Anesth Analg. 2010 Dec;111(6):1561. doi: 10.1213/ANE.0b013e3182009a22.

No abstract available.

Notice of retraction.

Anesthesia and analgesia

Shafer SL.
PMID: 21106980
Anesth Analg. 2010 Dec;111(6):1567. doi: 10.1213/ANE.0b013e3182040b99.

No abstract available.

Transient absorption of attosecond pulse trains by laser-dressed helium.

Optics letters

Chen S, Schafer KJ, Gaarde MB.
PMID: 22739858
Opt Lett. 2012 Jun 15;37(12):2211-3. doi: 10.1364/OL.37.002211.

We investigate transient absorption of high harmonics in an attosecond pulse train by laser-dressed He atoms using both single-atom and macroscopic methods. Calculations of the absorption as a function of laser wavelength and intensity reveal that the absorption probability...

Showing 1 to 12 of 209 entries