Tunable plasmonic-lattice mode sensors with ultrahigh sensitivities and figure-of-merits

2016 ◽  
Vol 119 (24) ◽  
pp. 244503 ◽  
Author(s):  
S. M. Sadeghi ◽  
W. J. Wing ◽  
Q. Campbell
Keyword(s):  
Lattice Mode

scholarly journals Parametric amplification of optical phonons

2018 ◽  
Vol 115 (48) ◽  
pp. 12148-12151 ◽  
Author(s):  
A. Cartella ◽  
T. F. Nova ◽  
M. Fechner ◽  
R. Merlin ◽  
A. Cavalleri
Keyword(s):  
Density Functional ◽  
Optical Gain ◽  
Density Functional Theory Calculations ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Many Body ◽  
Microscopic Mechanism ◽  
Lattice Mode ◽  
Many Body Interactions ◽  
Kinetics Of

We use coherent midinfrared optical pulses to resonantly excite large-amplitude oscillations of the Si–C stretching mode in silicon carbide. When probing the sample with a second pulse, we observe parametric optical gain at all wavelengths throughout the reststrahlen band. This effect reflects the amplification of light by phonon-mediated four-wave mixing and, by extension, of optical-phonon fluctuations. Density functional theory calculations clarify aspects of the microscopic mechanism for this phenomenon. The high-frequency dielectric permittivity and the phonon oscillator strength depend quadratically on the lattice coordinate; they oscillate at twice the frequency of the optical field and provide a parametric drive for the lattice mode. Parametric gain in phononic four-wave mixing is a generic mechanism that can be extended to all polar modes of solids, as a means to control the kinetics of phase transitions, to amplify many-body interactions or to control phonon-polariton waves.

Sub-Second Tracing of Lattice Mode Changes During the Melting of an Anthracene Crystal

2010 ◽  
Author(s):  
Hajime Okajima ◽  
Hiro-o Hamaguchi ◽  
P. M. Champion ◽  
L. D. Ziegler
Keyword(s):  
Lattice Mode ◽  
Anthracene Crystal

Lattice Mode Degeneracy in MoS2and Other Layer Compounds

1970 ◽  
Vol 25 (6) ◽  
pp. 362-365 ◽  
Author(s):  
J. L. Verble ◽  
T. J. Wieting
Keyword(s):  
Lattice Mode

Investigation of the Rotary Lattice Mode in R2PtCl6 Compounds. II. From a Study of the 35Cl Nuclear Quadrupolar Spin–Lattice Relaxation

1971 ◽  
Vol 49 (19) ◽  
pp. 2389-2395 ◽  
Author(s):  
Robin L. Armstrong ◽  
Douglas F. Cooke
Keyword(s):  
Relaxation Time ◽  
Pressure Dependence ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Published Data ◽  
Spin Lattice Relaxation Time ◽  
Spin Lattice ◽  
Lattice Mode ◽  
Temperature And Pressure

Measurements of the temperature and pressure variation of the 35Cl nuclear spin–lattice relaxation time in Rb2PtCl6 and Cs2PtCl6 are reported. The spin–lattice relaxation time is measured at atmospheric pressure for temperatures from 60 to 500 K and at four temperatures between 290 and 380 K for pressures to 5000 kg cm−2. Previously published data for K2PtCl6 are also included in the discussion. The Van Kranendonk theory of nuclear quadrupolar relaxation forms the basis of the analysis. The rotary lattice mode frequencies are deduced; they are of approximately the same magnitude and increase in the same sequence as the frequencies deduced from nuclear quadrupole resonance frequency measurements and from infrared and Raman data. An analysis of the pressure dependence of the spin–lattice relaxation time data yields order of magnitude pressure coefficients for the rotary mode frequencies. Finally, a thermodynamic analysis, which takes specific volume effects into account by incorporating both the temperature and pressure dependence of the data, is presented.

On the interpretation of impurity induced lattice mode absorption

1975 ◽  
Vol 17 (5) ◽  
pp. 557-558 ◽  
Author(s):  
J.T.E. Kaper ◽  
J. van der Elsken
Keyword(s):  
Lattice Mode

Effect of Pressure on the Rotary Lattice Mode of K2PtCl6

1971 ◽  
Vol 54 (2) ◽  
pp. 813-814 ◽  
Author(s):  
Robin L. Armstrong
Keyword(s):  
Effect Of Pressure ◽  
Lattice Mode
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