Your Perfect Assignment is Just a Click Away
We Write Custom Academic Papers

100% Original, Plagiarism Free, Customized to your instructions!

glass
pen
clip
papers
heaphones

engineering

engineering

Spectroscopic ellipsometry measurements on a germanium crystal at a photon energy of 1.5 eV show
that the real and imaginary parts of the complex relative permittivity are 21.56 and 2.772 respectively.
Find the complex refractive index. What is the reflectance and absorption coefficient at this wavelength?
How do your calculations match with the experimental values of n = 4.653 and K = 0.298, R = 0.419 and
α = 4.53 × 106 m-1 ?
a. Show that the attenuation coefficient a due to free carrier absorption is given by
α ω ε
ε
σ =


“³
=

 

 
c n c n
r
o
1
Free carrier absorption
where ω is the angular frequency of the EM radiation, ε
r”³ is the imaginary part of the relative
permittivity, n is the refractive index and σ is the conductivity due to free carriers in the sample.
b. Intrinsic germanium has a conductivity of about 2.1 Ω-1 m-1. Calculate the imaginary part εr”³ of the
relative permittivity at a wavelength of 20 μm. Find the attenuation coefficient α due to free carrier
absorption. The refractive index of germanium at the specified wavelength is n = 4.

Order Solution Now

Our Service Charter

1. Professional & Expert Writers: I'm Homework Free only hires the best. Our writers are specially selected and recruited, after which they undergo further training to perfect their skills for specialization purposes. Moreover, our writers are holders of masters and Ph.D. degrees. They have impressive academic records, besides being native English speakers.

2. Top Quality Papers: Our customers are always guaranteed of papers that exceed their expectations. All our writers have +5 years of experience. This implies that all papers are written by individuals who are experts in their fields. In addition, the quality team reviews all the papers before sending them to the customers.

3. Plagiarism-Free Papers: All papers provided by I'm Homework Free are written from scratch. Appropriate referencing and citation of key information are followed. Plagiarism checkers are used by the Quality assurance team and our editors just to double-check that there are no instances of plagiarism.

4. Timely Delivery: Time wasted is equivalent to a failed dedication and commitment. I'm Homework Free is known for timely delivery of any pending customer orders. Customers are well informed of the progress of their papers to ensure they keep track of what the writer is providing before the final draft is sent for grading.

5. Affordable Prices: Our prices are fairly structured to fit in all groups. Any customer willing to place their assignments with us can do so at very affordable prices. In addition, our customers enjoy regular discounts and bonuses.

6. 24/7 Customer Support: At I'm Homework Free, we have put in place a team of experts who answer to all customer inquiries promptly. The best part is the ever-availability of the team. Customers can make inquiries anytime.