Explosive nature of absorption upon the resonant formation of biexcitons

Journal Article · Wed Oct 01 04:00:00 EDT 1986 · JETP Lett. (Engl. Transl.); (United States)

OSTI ID:6226977

Nerkararian, KH V

The possibility of observing a time-dependent exponential increase in the absorption coefficient during the resonant formation of dissociating excitonic molecules in direct-gap semiconductors is considered. It is assumed that an electromagnetic wave whose frequency is at resonance with a transition from an exciton state to a biexciton state is incident on a crystal. It is found that, with increasing momentum (K), the transition frequency decreases by K-squared/4m, where m is the mass of the exciton. As a result, the spectral band of biexciton absorption will be broad. It is noted that explosive absorption can be realized only if the spectral width of the incident wave is such that a significant fraction of the excitons can participate in the process. 6 references.

• Research Organization: Erevanskii Gosudarstvennyi Universitet, Yerevan, Armenian SSR
• OSTI ID: 6226977
• Journal Information: JETP Lett. (Engl. Transl.); (United States), Journal Name: JETP Lett. (Engl. Transl.); (United States) Vol. 44; ISSN JTPLA
• Country of Publication: United States
• Language: English

Related Subjects

656003* -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTIVITY
DISSOCIATION
DYE LASERS
ENERGY GAP
EXCITONS
LASERS
LIQUID LASERS
MATERIALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
QUASI PARTICLES
SEMICONDUCTOR MATERIALS