Search NASA⌕ Search

Engineering topics

Maleki, L.

Publications and source records attributed to Maleki, L..

At least 37 records · Page 2
All sourcesNASA NTRSDOE OSTI
NASA NTRS2002

High-Q whispering-gallery mode sensor in liquids

Optical sensing of biomolecules on microfabricated glass surface requires surface coatings that minimize nonspecific binding while preserving the optical properties of the sensor.

biosensor evanescent wave streptavidin-biotin Q fa↗
NASA NTRS2002

Dispersion compensation in whispering gallery modes

We show that manipulation by a spatial profile of refractive index of a circularly symmetric dielectric cavity results in a novel way of fine tuning frequency separations as well as spatial localizations of high-Q whispering gallery modes excited in the cavity. The method enables dispersion compensation in the modes (spectrum equalization), diminishes the quality-factor limitation by surface roughness and contamination, and enables critical coupling to ultra-high-Q modes without maintaining an air-gap with evanescent couplers.

photonic↗
NASA NTRS2001

Noise in state of the art clocks and their impact for fundamental physics

In this paper a review of the use of advanced atomic clocks in testing the fundamental physical laws will be presented. Noise sources of clocks will be discussed, together with an outline their characterization based on current models. The paper will conclude with a discussion of recent attempts to reduce the fundamental, as well as technical noise in atomic clocks.

noise state-of-the-art clocks fundamental physics↗