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Questions
This imаge is demоnstrаting sоnоgrаphic features of:
Prоblem 1 - 1D Metаmаteriаls Cоnsider a 1D metamaterial cоnsisting of five bilayers of 10 nm silver with 150 nm air spacer layers, as depicted in the figure below. Figure 1: Schematic of a 1D metamaterial, here consisting of five bilayers of 10 nm silver with 150 nm air spacer layers. The absorption spectrum of this structure for wavelengths ranging from 300 nm to 2000 nm is as follows: Figure 2: (a) Reflection (blue), transmission (red), and absorption (yellow) for 1D metamaterials. (b) Absorption for 1D metamaterials (blue) and bulk Ag (red). 1a. How is this absorption spectrum of a 1D metamaterial different than the absorption of bulk silver? 1b. What are the peak absorption wavelengths for the 1D metamaterial and the bulk Ag wafer? 1c. Is this periodic structure more or less sensitive to wavelengths than bulk silver? 1d. Mention one potential application of the 1D metamaterial. Problem 2 2a. What is the difference between a guided mode and leaky mode? 2b. What is the essential difference of wave optical matrices compared to ray optical matrices? 2c. Why are T-matrices less numerically stable than S-matrices? 2d. If computing an S-matrix problem with 50x50 plane waves takes 2 minutes, then how long will it take to calculate 100x100 plane waves? 2e. Mention one advantage of the S-matrix method. 2f. Mention one disadvantage of the S-matrix method. Congratulations, you are almost done with Exam 2. DO NOT end the Examity session until you have submitted your work to Gradescope. When you have answered all questions: Use your smartphone to scan your answer sheet and save the scan as a PDF. Make sure your scan is clear and legible. Submit your PDF to Gradescope as follows: Email your PDF to yourself or save it to the cloud (Google Drive, etc.). Click this link to go to Gradescope: https://www.gradescope.com/courses/695047 Submit your exam to the assignment Exam 2. Return to this window and click the button below to agree to the honor statement. Click Submit Quiz to end the exam. End the Examity session.