Abstract
We present and analyze a simple model based on six rate equations for an electrically pumped organic diode laser. The model applies to organic host-guest systems and includes Stoke-shifted reabsorption in a self-consistent manner. With the validated model for the Alq3:DCM host-guest system, we predict the threshold for short-pulse laser operation. We predict laser operation characterized by damped relaxation oscillations in the GHz regime and several orders of magnitude linewidth narrowing. Prospect for CW steady-state laser operation is discussed.
Highlights
Rate-Equation Model, Reabsorption, An Organic Diode Laser (ODL) is the lasing manifestation of an Organic Light EmittingDiode (OLED)
Polarons appear in two manifestations, positively charged hole-like polarons and negatively charged electron-like polarons, where in view of assumed charge neutrality both populations are equal, NP + = NP −
Since γ is related to the polaron mobilities μh ∧ μe as γ = ee, and since according to the Poole-Frenkel model the mobilities show an exponential dependence on the square root of the electric field F, we expect the value of γ to increase substantially with increasing applied diode voltage
Summary
Rate-Equation Model, Reabsorption, An Organic Diode Laser (ODL) is the lasing manifestation of an Organic Light Emitting. Because solid-state organic materials, contrary to their III-V counterparts, cover continuously the whole visible spectrum as well as part of the IR and UV spectrum. They can be deposited more on almost any substrate with less energy consumption for the manufacturing process than conventional epitaxially-grown III-V materials [8]. This new device combines properties from dye-lasers and III-V diode lasers and as such will open new perspectives and potential applications. We will summarize our rate-equation theory for an electrically injected ODL [16], extend the theory to include a detailed treatment of the self-consistent reabsorption, and present simulation results for operation below and above laser threshold
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