Publications

We report on direct measurements of the electronic shot noise of a quantum point contact (QPC) at frequencies v in the range 4-8 GHz.

We have measured changes in small-signal gain spectra of an optical amplifier caused by the presence of a second signal at a different wavelength.

The bond-orientational ordering in free-standing liquid-crystal thin films of various thicknesses in the hexatic-B phase has been studied quantitatively using electron diffraction.

We have observed a two-step melting transition in a two dimensional system with classical screened Coulomb interactions.

We have observed a two-step melting transition in a two dimensional system with classical screened Coulomb interactions.

We have observed a two-step melting transition in a two dimensional system with classical screened Coulomb interactions.

Optical spectroscopy of crystals of Ba sub 2 YCu sub 3 O sub (6+x) and La sub (2-X) Sr sub x CuO sub 4 reveal a substantial absorption band in addition to what is expected from the dc transport.

We show that passive InP-InGaAsP waveguides exhibit high non- linear loss due to the highly energetic carriers generated by two-photon absorption.

We show that passive InP-InGaAsP waveguides exhibit high non-linear loss due to the highly energetic carriers generated by two-photon absorption.

A combination of magnetic susceptibility and Mossbauer measurements on quasicrystalline i-Al sub (74) Mn sub (20-x) Fe sub x Si sub 6 (0.02 = x = 7.5) establishes that Mn atoms in i-Al sub (74) Mn