Electrically amplified optical recording in polymer films

Abstract

The laser power required to record high contrast marks in a polymer film can be reduced two orders of magnitude by depositing the film on a transparent conductor-photoconductor-conductor sandwich. The sensitivity of this medium is controlled by adjusting the voltage applied to the conductors. In the power limited regime, as little as 0.1 mW of laser power can increase the ohmic heating at the focus enough to produce symmetric micrometer size bubbles in the adjacent polymer film without damaging the photoconductor. However, due to the high dark resistivity of the photoconductor, the power dissipation in the unilluminated region is only ≊0.01 W/cm2.

Polymers as substrates and media for data storage

“…9. Schematic drawing of a polymer optical memory with integrated electrical amplification of the signal recording (Bell) (22).…”

Polymere als Träger und Speicher von Informationen

“…Erreicht wurden Speicherdichten um lo6 bit/cm2 bei kombinierten Belichtungs-IEntwicklungszeiten von 100 psec; die Reversibilitat blieb allerdings bisher auf einige Tausend Zyklen beschrankt [21]. Eine Weiterentwicklung dieser Speichertype wurde kurzlich von den Bell-Laboratorien vorgestellt [22].…”