Near-Forward Raman Scattering in LiNbO3

Puthoff, H. E.; Pantell, R. H.; Huth, B. G.; Chacon, M. A.

doi:10.1063/1.1656503

Cited by 64 publications

(11 citation statements)

References 13 publications

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“…Fig. 2 shows the dispersion of ordinary phonon polaritons in a-quartz calculated with equation ( 5 ) for the branches m i , --+ w 1 6 and 0k6 + w17. Dampingis neglected R(a, w ) = 1 according to equation (6).…”

Section: Resultsmentioning

confidence: 99%

Dispersion of bulk phonon polaritons inside reststrahlen bands

Schuller

Falge

Börstel

1977

Physica Status Solidi (b)

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When pure spatial damping is taken into account, i.e. when the wave vector is treated as complex and the frequency as a real quantity, dispersion curves of bulk phonon polaritons exhibit turnabouts caused by limiting momenta for the wave vectors which lead to branches within the frequency range of reststrahlen bands. The evaluation of the dispersion curves from reflection experiments for fixed frequency and swept angle of incidence confirms these features. Depending on the experimental arrangement dispersion curves inside of reststrahlen bands are investigated for a-quartz. The measurements turn out to be a sensitive aid for the determination of damping parameters.Wenn rein raumliche Danipfung in Rechnung gestellt wird. d. h. wenn man den Wellenvektor als komplexe und die Frequenz als reelle GroDe behandelt, weisen Dispersionskurven von Volumen-Phononpolaritonen Umkehrungen auf, die durch Grenzwerte fur die Wellenvektoren hervorgerufen werden und zu Zweigen innerhalb des Frequenzbereichs von Reststrahlenbanden fiihren. Die Ermittlung der Dispersionskurven aus Reflexionsexperimenten mit konstanter Frequenz und variiertem Einfallswinkel bestatigt diese Eigenschaften. I n Abhangigkeit von der experimentellen Anordnung werden Dispersionskurven innerhalb von Reststrahlenbanden an a-Quarz untersucht. Die Messungen erweisen sich als empfindliches Hilfsniittel bei der Ermittlung von Dampfungsparametern.

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Section: Resultsmentioning

confidence: 99%

Dispersion of bulk phonon polaritons inside reststrahlen bands

Schuller

Falge

Börstel

1977

Physica Status Solidi (b)

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“…In this communication, we report the first direct observation 2 of the self-induced pulsing of the laser intensity and the Significant narrowing of these pulses which is produced by a small microwave modulation of the laser injection current. 3 The detection system, shown schematically in Fig. 1, utilized a Si PIN photodiode whose output was monitored by a fast sampling oscilloscope 4 with a 30-psec rise time.…”

Section: Optical Pulses From Cw Gaas Injection Lasersmentioning

confidence: 99%

EFFICIENT, TUNABLE OPTICAL EMISSION FROM LiNbO3 WITHOUT A RESONATOR

Yarborough

Sussman

Purhoff

et al. 1969

Applied Physics Letters

Self Cite

167

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We report the first observation of tunable stimulated optical emission from a nonlinear crystal without the use of an external resonator, and with greater than 50% conversion of the pump beam to the tunable frequency. Opposite faces of a LiNbO3 crystal were polished flat and parallel to provide for multiple reflections of the signal radiation (Stokes) inside the crystal. The A1 symmetry 248-cm−1 polariton mode was excited with a Q-switched ruby laser, and the signal frequency was tuned by varying the angle of incidence of the laser beam relative to the normal to the crystal surface. Operation was at room temperature; no crystal damage was observed over most of the tuning range; and laser depletion occurred within the first few nanoseconds of the Q-switched pulse. The difference between the Stokes frequency and laser frequency was varied from 42 to 200 cm−1, and the corresponding idler wavelength was varied from 238 to 50 μ.

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“…axis of the crystal is involved [6]. This mode is strongly coupled with far-infrared light and forms an elementary excitation wave called a polariton.…”

Section: Introductionmentioning

confidence: 99%