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## Main Question or Discussion Point

1. What do we mean by the carrier number at transparency. I mean, what is carrier transparency of a laser?

2. in an IEEE paper ("Circuit Modeling of Quantum-Well Lasers for Optoelectronic Integrated Circuits (ICs) Including Physical Effect of Deep-Level Traps" IEEE J. Quantum electronics, vol. 38, No. 11, November 2002 ) by Mohammad reza Salehi,

he introduced an equation,

Gamma = 0.3 * N' * (d/d0)

where Gamma is the optical Confinement Factor, N' is the number of quantum wells of the laser and d is the thickness of a single quantum well. He said, d0=1000A(angstrom). Now my question is, Where does this d0 come from and why did they mentioned that its value is 1000. I looked at the reference of this paper, they did the same. the didn't mention this either that what is d0.

thank you

2. in an IEEE paper ("Circuit Modeling of Quantum-Well Lasers for Optoelectronic Integrated Circuits (ICs) Including Physical Effect of Deep-Level Traps" IEEE J. Quantum electronics, vol. 38, No. 11, November 2002 ) by Mohammad reza Salehi,

he introduced an equation,

Gamma = 0.3 * N' * (d/d0)

where Gamma is the optical Confinement Factor, N' is the number of quantum wells of the laser and d is the thickness of a single quantum well. He said, d0=1000A(angstrom). Now my question is, Where does this d0 come from and why did they mentioned that its value is 1000. I looked at the reference of this paper, they did the same. the didn't mention this either that what is d0.

thank you