Clementine: a deep space mission to flight qualify lightweight spacecraft components.
Abstract
Rugates are optical structures that have a sinusoidal index of refraction (harmonic gradient-index field). As their discrete high/ low index filter counterparts, they can be used as narrow rejection band filters. However, since rugates do not have abrupt interfaces, they tend to have a smaller absorption, hence deliver a higher in band reflectivity. The absence of sharp interfaces makes rugates even more desirable for high-energy narrow band reflectors. In this application, the lack of a sharp interface at the maximum internal standing wave electric field results in higher breakdown strengths. Our method involves fabricating rugates, with molecular beam epitaxy, on GaAs wafers as an Al(x)Ga(1-x)As single-crystal film.
- Publication:
-
Advanced Technologies for Planetary Instruments
- Pub Date:
- 1993
- Bibcode:
- 1993atpi.workQ..20R
- Keywords:
-
- Aluminum Gallium Arsenides;
- Gallium Arsenides;
- Infrared Radiation;
- Molecular Beam Epitaxy;
- Optical Materials;
- Reflectance;
- Reflectors;
- Refractivity;
- Semiconductors (Materials);
- Sine Waves;
- Wafers;
- Electric Fields;
- Fabrication;
- Internal Waves;
- Narrowband;
- Standing Waves;
- Optics;
- Space Instrumentation: Minor Planets;
- Space Instrumentation: Moon;
- Space Missions: Minor Planets;
- Space Missions: Moon