Maximizing Absorption Coefficient: Optoelectronic Equation Homework

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In summary, the conversation discusses using the given equation for absorption coefficient in terms of frequency to find the wavelength that gives the maximum value of absorption coefficient. The suggestion is to either use a programming method or plot the function graphically to find the maximum. It is also mentioned that simplifying the equation by eliminating terms that do not depend on frequency may make it easier to take the derivative.
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leftovergold
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Homework Statement



Given the following equation for absorption coefficient in terms of frequency, find the wavelength that gives the maximum value of absorption coefficient.

The question: http://i.imgur.com/1jYg8.png

Homework Equations



Here is the equation: http://i.imgur.com/XUnHC.gif

The Attempt at a Solution



I am not sure how to begin this question. My initial guess is to use the "take the derivative and set equal to zero" method to find the maximum however this equation is out of my understanding for that method. I should note I understand the equation and all constants, just not what the question is asking for me to do.

Not looking for a solution here but just a suggestion on how to approach this question. Thank you.
 
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  • #2
You could use a programming method to find a maximum, or plot the function and find a maximum graphically. Otherwise, yes, the approach would be to differentiate and set equal to zero in the usual fashion.

Note that there are only two terms in the equation that appear to depend upon the frequency. So throw everything else away. That should make the derivative look a bit less daunting.
 

FAQ: Maximizing Absorption Coefficient: Optoelectronic Equation Homework

What is the absorption coefficient and why is it important in optoelectronic equations?

The absorption coefficient is a measure of how much light is absorbed by a material when it passes through it. In optoelectronics, it is important because it determines the efficiency of light absorption in devices such as solar cells and photodetectors.

How is the absorption coefficient calculated?

The absorption coefficient is calculated by taking the negative natural logarithm of the ratio of the incident light intensity to the transmitted light intensity. It is typically expressed in units of 1/cm.

What factors affect the absorption coefficient?

The absorption coefficient is affected by several factors, including the type of material, its thickness, and the wavelength of light. It is also influenced by the presence of impurities or defects in the material.

How can the absorption coefficient be maximized?

The absorption coefficient can be maximized by choosing a material with a high absorption coefficient, increasing its thickness, and optimizing the design of the optoelectronic device. Additionally, using antireflective coatings or texturing the surface of the material can also increase light absorption.

What are some applications of maximizing the absorption coefficient?

Maximizing the absorption coefficient is crucial for the efficient functioning of optoelectronic devices such as solar cells, photodetectors, and LEDs. It is also important in fields such as spectroscopy, where it is used to measure the concentration of a substance in a solution.

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