Whats the amount of wavelength stoke shift

Reference no: EM133096510

Some student asked me whether the m0 (rest mass of electron) shall be in the denominator in HW1-1 (a), so the question is to prove following.

Δω = ω - ω' = hk²/2(1/m_e + 1/m_h)

Stoke effect of semiconductor

Consider a direct bandgap semiconductor is excited by a laser light with photon energy hw. Since the excitation is weak, most of the carriers will relax to the band edge and recombine to generate PL with photon energy hω'.

(a) Show that:

Δω = ω - ω' = hk²/2(1/m_e + 1/m_h)

(b) Consider GaN (E₀ = 3.45eV) is excited by He-Cd laser (λ = 325 nm). The effective mass of electrons and holes are 0.2m₀ and 1.2m₀, respectively. What's the allowed k for excitation?

Please express kin the unit of nm^-1.

Reference no: EM133096510

Questions Cloud

Effectiveness of the organizational rules : What common mistake do organizations make that results in reduced effectiveness of the organizational rules? Share the reasons for the rules with employees revi

Difference between orientation and socialization : 1. Understand the difference between orientation and socialization: define and explain

Define the term quasi-experiment : Define the term quasi-experiment and discuss the pros and cons of this research method.

Describe five different incentive plans : Identify and briefly describe five different incentive plans offered to hourly and/or salaried employees.

Whats the amount of wavelength stoke shift : What's the amount of wavelength Stoke shift between excitation source and the PL peak in nm - What's the allowed k for excitation

Competency-based job analysis : Suppose that you got a job of sales manager which is your dream job but due to Covid 19, there were salary cuts, revisions of reward and compensation system, la

Steadily performing employee of comcast telecom : a) Sheela Jacobs has been a long-standing and steadily performing employee of Comcast Telecom. But after her marriage, she has been increasingly troubled due to

Low importance to the hr function : You are hired as the human resource manager in a firm that previously gave low importance to the HR function. Most of the human resource management systems and

What semiannual withdrawal must be made : Carlos has 50,000 in a bank which he invests at 8% compounded semi annually. What semiannual withdrawal must be made for 3 years

User Account

All Pages