On the Refractive Index at the Exciton Resonance of Highly Excited CdS

Henneberger, F.; Puls, J.; Rossmann, H.; Uraltsev, I. N.

doi:10.1002/pssb.2221210253

Cited by 18 publications

(10 citation statements)

References 5 publications

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“…The electronic effects induced by excitation are similar to Fig. 3 and were discussed in detail in [14]. Up to the largest delay time there is no significant shift ( 5 0.2 meV) of the interference fringes.…”

Section: T = W Kmentioning

confidence: 78%

Resonatorless Optical Bistability of CdS Reconsideration of Transient Effects Due to Lattice Heating

Rossmann¹,

Henneberger²

1985

Physica Status Solidi (b)

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Results of laser pulse transmission measurements are presented. Introducing a variable optical delay between exciting and probing pulse the relaxation behaviour of induced optical nonlinearities in the spectral region around the A,,I-exciton resonance is investigated. Optical bistability reported earlier is supported. Crystal lattice heating and nonstationarity due to long-living extrinsic effects are observed, too, but are of minor importance.Es werden die Resultate von Laserimpuls-Transmissionsmessungen vorgestellt. Mit Hilfe einer variablen optischen Verzogerung zwischen anregendem und testendem Lichtimpuls wird das Relaxationsverhalten anregungsinduzierter optischer Nichtlinearitaten im Spektralgebiet der A,,I-Exzitonenresonanz untersucht. Eine friiher gegebene Interpretation im Sinne einer optischen Bistabilitat wird bestatigt. Die Kristallgitteraufheizung und Nichtstationaritat infolge langlebiger extrinsischer Effekte wird zwar ebenfalls beobachtet, ist jedoch von untergeordneter Bedeutung.

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Section: T = W Kmentioning

confidence: 78%

Resonatorless Optical Bistability of CdS Reconsideration of Transient Effects Due to Lattice Heating

Rossmann¹,

Henneberger²

1985

Physica Status Solidi (b)

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“…The deviations between calculated and measured spectra of I T R , 11, and, hence, of q1 on the low-energy side may be due to impurity absorptions of the crystal which are not considered in numerical calculations. The slightly higher values of q1 on the low-energy side with respect to the theoretically expected ones could be also due to an induced small non-resonant background absorption resulting from a shrinking of the band edge caused by many-exciton effects [22].…”

Section: Comparison Of Measured and Calculated Spectramentioning

confidence: 97%

Transient Light‐Induced Gratings Due to Excitons in CdSe

Rückmann

Jarašiūnas²,

Gaubas³

1985

Physica Status Solidi (b)

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Transient light-induced grat,ings due to free carriers and excitons are created in CdSe in a medium density range of lOI5 to 1017 by two coherent intense (ns) IR-pump beams. Detailed investigations of probe-beam diffraction due to thin excitonic gratings in the spectral region just below the A,=l-exciton line a t 85 K and its dependence on sample temperature and on the excitation level are presented. First-order diffraction efficiences up to 5% and a nonlinear dependence of diffraction on the excitation level can be observed. For the first time numerical calculations of probe-beam diffraction due to excitonic phase and amplitude gratings are presented. The comparison with the experiment shows, that the damping of a dense exciton gas increases proportional to the excitation intensity in the case of two-photon interband excitation, and that the lightinduced absorptive changes Aha due to dense excitone dominate over the dispersive changes An in the spectral region under consideration. Mittels zweier, kohirenter und intensiver (ns) IR-Pumpstrahlen werden lichtinduzierte Gitter in CdSe, hervorgerufen durch freie Triiger und Exzitonen in einem mittleren Dichtebereich vonlox5 bis IOl7 cm-s, erzeugt. Vorgestellt werden detaillierte Untersuchungen der Probenstrahlbeugung an dunnen exzitonischen Gittern bei 85 K sowie deren Temperatur-und Intensitatsabhiingigkeiten im Spektralbereich nahe unterhalb der A, = 1-Exzitonenlinie. Beugungseffizienzen in der 1. Ordnung bis zu 5% und eine nichtlineare Intensitatsabhiingigkeit der Beugung werden beobachtet. Erstmalig werden numerische Berechnungen der Lichtbeugung an exzitonischen Phasen-und Amplitudengittern vorgestellt. Der Vergleich mit dem Experiment zeigt ein proportionales Wachsen der exzitonischen Dampfung mit der Anregungsintensitat im Falle der ZweiPhotonen-Interbandanregung sowie das Dominieren der durch das erzeugte dichte Exzitonengas hervorgerufenen licht-induzierten absorptiven hderungen Acu iiber die dispersiven hderungen An im betrachteten Spektralbereich.

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“…They also found a series of equally spaced lines between 5150 and 5600 ,~, which were ascribed to electron transitions involving phonons. Another group that studied excitons was Henneberger et al [52], who used artificially grown platelets of CdS and measured the transmission between crossed polaroids. Pevtsov and his colleagues [50,51] carried out thorough investigations on two types of excitons, specified as type A and type B, due to the double degeneracy of the valence band.…”

Section: Excitonsmentioning

confidence: 99%

Cadmium Sulphide (CdS)

Ward

1997

Handbook of Optical Constants of Solids

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On the Refractive Index at the Exciton Resonance of Highly Excited CdS

Cited by 18 publications

References 5 publications

Resonatorless Optical Bistability of CdS Reconsideration of Transient Effects Due to Lattice Heating

Resonatorless Optical Bistability of CdS Reconsideration of Transient Effects Due to Lattice Heating

Transient Light‐Induced Gratings Due to Excitons in CdSe

Cadmium Sulphide (CdS)

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