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Optical properties of multisource thermally evaporated III-V semiconductor compounds
1Infrared Division, U.S. Naval OrdnanceLaboratory, Corona, California, USA.
Applied Optics
|January 6, 2010
Summary
This study demonstrates the multisource technique for preparing III-V semiconductor films like Indium Antimonide (InSb) and Indium Arsenide (InAs). These films show promise for optical components, with unique absorption properties compared to bulk materials.
Area of Science:
- Materials Science
- Solid-State Physics
- Optoelectronics
Background:
- III-V semiconductor films are crucial for advanced optical components.
- Controlled layer deposition is essential for precise optical properties.
Purpose of the Study:
- To prepare and characterize III-V semiconductor films using the multisource technique.
- To investigate the optical properties, specifically refractive index dispersion and absorption, of InSb and InAs films.
- To explore the potential of multisource technique for creating III-V solid solutions.
Main Methods:
- Multisource deposition technique for III-V semiconductor films.
- Spectroscopic analysis of refractive index dispersion.
- Investigation of absorption processes and intrinsic edge absorption.
- Preparation of Ga((3/4))In((1/4))Sb solid solutions.
Main Results:
- III-V semiconductor films, including InSb and InAs, were successfully prepared.
- Refractive index dispersion in InSb and InAs films mirrors bulk material behavior.
- Absorption processes due to excess carrier scattering are significantly enhanced in films compared to bulk.
- Intrinsic edge absorption in n-type InAs films follows exponential behavior similar to bulk.
- Solid solutions of III-V mixtures were achieved, enabling parameter studies.
Conclusions:
- The multisource technique is effective for producing III-V semiconductor films with tailored properties.
- Film properties, while similar to bulk in some aspects, exhibit distinct absorption characteristics.
- This method facilitates the study of fundamental semiconductor parameters in solid solutions.
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