Brillouin Scattering in Lithium Niobate

O’Brien, Robert; Rosasco, G. J.; Weber, Alfons

doi:10.1007/978-3-642-87357-7_67

Cited by 10 publications

(3 citation statements)

References 7 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because of the relatively large piezoelectrically induced increase in the magnitude (piezoelectric stiffening) and anisotropy of the sound velocity entering into formula (25), by precise measurements of the Brillouin frequency shift in the dependence of the scattering geometry (e.g. the scattering angle 0) and of the polarizations, not only the pure elastic but also (certain) piezoelectric constants can be determined, (Cecchi et aL, 1970;O'Brien et al, 1969). Moreover the intensities of the non-linearly generated waves essentially depend on the tensor of the effective photoelastic constants.…”

Section: Briliouin Scattering In Piezoelectric Mediamentioning

confidence: 99%

The influence of piezoelectric coupling on material constants determining Brillouin scattering

Macheleidt¹

1975

Acta Cryst Sect A

View full text Add to dashboard Cite

The piezoelectric modifications of the tensors of elastic, optical and photoelastic constants and their consequences on spontaneous and stimulated Brillouin scattering are discussed. Basic equationsStarting with the expansion of the thermodynamic potential f(Uz,,,,Ez) of a lossless medium with respect to the strain Uz~ and the electric field Et,we obtain the equations of state we need for the macroscopic description of the Brillouin scattering process Of --fliktn, Ulm -t-~stkEs-t-½~tmikEtEm Stk-OUt,,Since we are dealing with high-frequency processes, namely ultrasonic and optical waves, in (2) and (3) the partial derivatives should be taken at constant entropy. That is the coefficients in (2) and (3) represent adiabatic constants. The optical constants ~k and etk = ark + eofitk, the elastic constants flt,,,,, the piezoelectric constants )'tkt, the electrooptical constants atkz and the photoelastic constants Yikt,n give the connexions between the electric field Et. the strain U~m and the electric polarization Pt as well as the stress S~k. The linear piezoelectric coupling of the elastic and electric fields is given by the tensor of the piezoelectric constants Ys,,. Because of its index symmetry ys,k= 7ski there are only 18 linearly independent components. This number is further reduced by the symmetry of the crystallographic class. For instance C6v (6ram) (e.g. ZnO, CdS, ZnS, CdSe, CdTe, ZnTe) has three independent piezoelectric constants, Car (3m) (e.g. LiNbO3) four constants, Ta ~3m) (e.g. ZnS, GaAs, InSb, GaP, InAs, ZnSe) only one independent component. For media with inversion symmetry piezoelectricity does not exist.We have to substitute the equations of state (2,3) into the field equations of Maxwell's and Newton's continuum theory Mixed acoustoelectromagnetic wavesAt first we will consider only the linear terms and assuming plane waves with wave vectors k = kn, K = KN and unit vectors n,N of the wave normalsUt = Ut exp [i(Kx-f2t)],we get the equations (k=K, co=t2):(kikk-k2~ik q-C~ eik )Ek --lflofD ~ikl (e~'~2c~il--~iklmkmkk)Ui "~ i~)sikEskk=O .

show abstract

Section: Briliouin Scattering In Piezoelectric Mediamentioning

confidence: 99%

The influence of piezoelectric coupling on material constants determining Brillouin scattering

Macheleidt¹

1975

Acta Cryst Sect A

View full text Add to dashboard Cite

show abstract

“…That the photoelastic constant p ij for the SLN crystal should be of the same order of magnitude as those for the CLN crystal seems a reasonable assumption. For the Ti:SLN (Ti 4 mol%) crystal, which showed almost the same value of Dn e as for the Tidiffused SLN waveguide, the calculated values for p 11 ¼ 0:034; p 12 ¼ 0:072; p 13 ¼ 0:096; p 14 ¼ 0:0066; p 31 ¼ 0:178; and p 33 ¼ 0:094 [13] at a wavelength of 633 nm are given in Table 1 investigate the shift of the absorption band edge, we therefore measured the transmittance spectra through room-temperature spectrophotometry. Fig.…”

Section: Resultsmentioning

confidence: 88%

Crystal growth and characterization of titanium-doped near-stoichiometric LiNbO3

Nakamura¹,

Takekawa²,

Kurimura³

et al. 2004

Journal of Crystal Growth

View full text Add to dashboard Cite

“…Bulk acoustic waves [15,16] and Rayleigh waves [17] in single crystals of LN have already been widely investigated by Brillouin Light Scattering (BLS). However, experimental data regarding surface BLS on deposited LN thin films are lacking.…”

mentioning

confidence: 99%

Dispersion of surface elastic waves on Z-LiNbO3 films on Z-sapphire

Spina

Micard

Mosset

et al. 2023

Applied Physics Letters

View full text Add to dashboard Cite

Epitaxial thin films of lithium niobate with a thickness of 160 nm, oriented along the crystallographic c axis, were grown by direct liquid injection chemical vapor deposition on c-sapphire substrates. Different families of very high-frequency surface acoustic waves with general polarization exist in such piezoelectric films on high-velocity substrates. Surface Brillouin light scattering measurements, complemented with fast finite element analysis of wave dispersion, demonstrate Rayleigh, leaky shear, and leaky longitudinal surface waves, excited at frequencies between 10 and 30 GHz. The Brillouin technique reveals dispersion and anisotropy of propagation without the implementation of high-frequency surface acoustic wave transducers.

show abstract

Brillouin Scattering in Lithium Niobate

Cited by 10 publications

References 7 publications

The influence of piezoelectric coupling on material constants determining Brillouin scattering

The influence of piezoelectric coupling on material constants determining Brillouin scattering

Crystal growth and characterization of titanium-doped near-stoichiometric LiNbO3

Dispersion of surface elastic waves on Z-LiNbO3 films on Z-sapphire

Contact Info

Product

Resources

About