Publications

• Article dans une revue

Theory of bulk and surface magnons in Heisenberg ferromagnetic superlattices

Leonard Dobrzynski, B. Djafari-Rouhani, H. Puszkarski

We present a theoretical study of the bulk and surface magnons of a semi-infinite stack of two different ferromagnetic films. Each film is modeled by a simple-cubic lattice of spins coupled via nearest-neighbor exchange (Heisenberg ferromagnet). The superlattice has a larger periodicity in the…

Physical Review B, 1986, 33 (5), pp.3251-3256. ⟨10.1103/PhysRevB.33.3251⟩. ⟨hal-04069433⟩

• Article dans une revue

Bulk and surface electronic states in semiconductor superlattices

P. Masri, Leonard Dobrzynski, B. Djafari-Rouhani, J.O.A. Idiodi

Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 1986, 166 (2-3), pp.301-326. ⟨10.1016/0039-6028(86)90681-3⟩. ⟨hal-04070286⟩

• Communication dans un congrès

Design of two terminal solid-state mm-wave sources

Paul-Alain Rolland, Marie-Renée Friscourt, Christophe Dalle, Didier Lippens

This paper describes a theoretical and experimental approach to design near optimum reliable two terminal mm. wave power sources. Emphasis is placed on power-frequency characteristic. Second order parameters such as noise and locking bandwidth are considered in the 94 GHz window.

IEE Colloquium on Millimetre Wave Component Design, 1986, Londres, United Kingdom. ⟨hal-00005283⟩

• Communication dans un congrès

Mm-wave solid-state power sources

P.A. Rolland, M.R. Friscourt, D. Lippens, Christophe Dalle, J.L. Nieruschalski

IEEE International Workshop on Millimeter Waves, 1986, Rome, Italy. ⟨hal-00005280⟩

• Article dans une revue

Interface response theory of discrete composite systems

L. Dobrzynski

A general theory of “interface responses” in discrete composite d-dimensional systems for operators with two-body interactions is presented. It is shown that the “interface responses” of all the internal and external interfaces of any composite system are the linear superposition of the responses…

Surface Science Reports, 1986, 6, pp.119-157. ⟨10.1016/0167-5729(86)90001-4⟩. ⟨hal-03517064⟩

• Article dans une revue

Theory of surface electronic states in metallic superlattices

B. Djafari-Rouhani, Leonard Dobrzynski, P. Masri

Physical Review B, 1985, 31 (12), pp.7739-7748. ⟨10.1103/PhysRevB.31.7739⟩. ⟨hal-04070078⟩

• Article dans une revue

Elastic interaction between surface anisotropic defects and steps or kinks

D. Desruelles, O. Hardouin-Duparc, B. Djafari-Rouhani, Leonard Dobrzynski

Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 1985, 152-153, pp.149-154. ⟨10.1016/0039-6028(85)90138-4⟩. ⟨hal-04070901⟩

• Article dans une revue

Current limiting cathodes for non transit-time limited operation of InP TED's in the 100 GHz window.

Marie-Renée Friscourt, Paul-Alain Rolland

Reverse-biased low-barrier Schottky contact and reverse-biased isotype GaInAsP/InP heterojunction, used as current limiting cathodes for InP TED's, are investigated on the basis of output power and efficiency improvement as compared to N+NN+ devices.

Physica B+C, 1985, 129 (1-3), pp.527-531. ⟨10.1016/0378-4363(85)90638-2⟩. ⟨hal-00005261⟩

• Communication dans un congrès

Stable millimeter wave sources using subharmonically injection locked gunn oscillators

D. Degrugillier, Christophe Dalle, Marie-Renée Friscourt, Paul-Alain Rolland

94 GHz stable sources using 2nd harmonic GaAs Gunn diodes and injection locking at 47 GHz by a high order avalanche frequency multiplier have been built. These sources exhibit a very low FM noise (less than - 80 dBc/Hz, 10 KHz from the carrier frequency). Power combining with InP fundamental Gunn…

15th European Microwave Conference, Sep 1985, Paris, France. ⟨10.1109/EUMA.1985.333478⟩. ⟨hal-00005279⟩

• Autre publication scientifique

Génération de puissance à l'état solide au-dessus de 100 GHz. 3- Structures à ionisation par choc : modèle macroscopique.

P.A. Rolland, Christophe Dalle, M.R. Friscourt

1985. ⟨hal-00005282⟩