University of Illinois - Urbana-Champaign
Two quantum photoconductivity in potassium iodide
Abstract
dc:descriptionPhotoconductivity associated with two quantum absorption processes have been observed in uncolored crystals of KI. A Q-switched ruby laser and a KDP harmonic generator were used to produce light pulses whose quantum energy is more than half the band gap energy. The phbtbresponse in KI depends upon the square of the incident light intensity. Since the photo carriers are generated nearly uniformly throughout the crystal, the technique is especially useful as an intrinsic generation mechanism for transport experiments on crystals without F center or other donors. The photoconductivity is observed to increase between one and two orders of magnitude as the crystal is cooled from 77°K to 4°K reflecting the increase in mobility as the longitudinal optical modes of lattice vibration freeze out. The electric and magnetic field dependences indicate higher mobilities than usually found in colored alkali halide crystals.
Degree
thesis:*- Name thesis:degree_name
- Ph.D.
- Level thesis:degree_level
- Dissertation
- Discipline thesis:degree_discipline
- Physics
- Date dc:date
- 10000-01-01
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Bolte, Steven Bernard
- Contributors dc:contributor
-
- Brown, Frederick C.
Subjects
dc:subject × 4Rights
dc:rights- Statement dc:rights
-
- 1970 Steven Bernard Bolte
- Language dc:language
- en
Identifiers
dc:identifier.*- Identifier
- 6065009
- OAI identifier oai:identifier
- oai:www.ideals.illinois.edu:2142/25843