All-Optical Spatial Light-Modulator with Megahertz Modulation Rates
We demonstrate a novel all-optical spatial Light modulator capable of megahertz modulation rates. It is based on the quantum-confined Stark effect, but the modulating electric field is entirely photogenerated by strongly asymmetric photocarrier transfer in GaAs/AlAs layers. In a nonoptimized sample, cw optical excitation of approximately 50 W/cm(2) created a 30-kV/cm electric field, inducing a 9-meV exciton red shift at room temperature. Under pulsed excitation the photogenerated electric field can be switched on in a few tens of picoseconds and relaxes in a few hundred nanoseconds, permitting megahertz modulation rates. (C) 1995 Optical Society of America
WOS:A1995RY84000021
1995
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2099
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Max planck inst festkorperforsch,d-70569 stuttgart,germany. ecole polytech fed lausanne,phb ecublens,ch-1015 lausanne,switzerland. cnet bagneux,france telecom,bagneux,france. Pelekanos, nt, cea,dept rech fondamentalle mat condensee,sp2m,psc,17 rue martyrs,f-38054 grenoble,france.
ISI Document Delivery No.: RY840
Cited Reference Count: 13
Cited References:
ANDO H, 1989, IEEE J QUANTUM ELECT, V25, P2135
DAWSON P, 1991, APPL PHYS LETT, V58, P2889
DEVEAUD B, 1994, PHYS REV B, V49, P13560
DOHLER GH, 1990, OPT QUANT ELECTRON, V22, S121
JEZEWSKI M, 1990, APPL PHYS LETT, V56, P2422
KOST A, 1990, OPT QUANT ELECTRON, V22, S187
LARSSON AG, 1992, OPT ENG, V31, P1576
MARZIN JY, 1994, PHYS REV LETT, V73, P719
MILLER DAB, 1985, PHYS REV B, V32, P1043
PELEKANOS NT, 1995, OPTICAL COMPUTING, P523
SCHNEIDER H, 1988, PHYS REV B, V38, P6160
TACKEUCHI A, 1992, APPL PHYS LETT, V61, P1892
VINA L, 1987, J PHYS C SOLID STATE, V20, P2803
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