The refractive index of silicon at 800 nm wavelength is n = 3.7 + 0.005i. (1)...
The refractive index of silicon at 800 nm wavelength is n = 3.7 + 0.005i.
(1) What is the reflectance when light is normally incident from air to a semi-infinite silicon?
(2) How much light energy is absorbed by silicon after propagating 10 mm inside silicon?
(3) How does absorption change when the wavelength of incident light is reduced, and what is the reason?
Homework Answers
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The refractive index of silicon at 800 nm wavelength is n = 3.7
+ 0.005i.
(1)...
Problem 3 (25 points) A silicon photodetector has an internal photo responsivity of 0.5 A/Wt wavelength of 850 nm. When photons of wavelength 850 nm are incident normally on this photodetector, so...
Problem 3 (25 points) A silicon photodetector has an internal photo responsivity of 0.5 A/Wt wavelength of 850 nm. When photons of wavelength 850 nm are incident normally on this photodetector, some photons are reflected back and some photons penetrate to the detection region and are absorbed by the photodetector. (a) The index of refraction of silicon is 3.45. If the electric current measured by this photodetector is 20 mA, what is the incident optical power? (b) Silicon has a...
The red light (wavelength = 630 nm) illuminates a cuvette at an incident angle of 30°...
The red light (wavelength = 630 nm) illuminates a cuvette at an incident angle of 30° with respect to the normal. The cuvette is made of glass (refractive index = 1.515) and some protein solution is inside the cuvette. At a specific protein solution, the refractive index of the solution is 1.34. If the protein concentration is increased, the refractive index of the solution gets higher. What physical parameter (e.g., angular change, distance change) can you measure to detect the...
Prob. 6b (6 pts.) A glass window is coated with a transparent film of refractive index...
Prob. 6b (6 pts.) A glass window is coated with a transparent film of refractive index n2=1.25. This film will cause destructive interference in the reflected light when light of wavelength λ = 550nm. is incident normally,on the window. What is the minimum thickness of film required to produce this anti-reflection coating? incident 1 air fim glass 1.25
In the Young’s Double Slit experiment above (set up in air), light of wavelength 546 nm...
In the Young’s Double Slit experiment above (set up in air),
light of wavelength 546 nm falls on the two slits. However for the
top slit the light has to pass through a glass container of length
16 mm containing a gas of refractive index ng. When this happens it
is observed that the central maxima (corresponding to equal path
distances) moves to the position of the 14 maxima if glass
container was not present.
Determine the refractive index of...
When you look through a 2.3 mm thick window comprised of a material whose refractive index...
When you look through a 2.3 mm thick window comprised of a material whose refractive index is 1.50, by what time interval is the light you see delayed by having to go through glass instead of air? By how many wavelengths is it delayed, if its vacuum wavelength is 600 nm?
6. A GaAs laser diode operating at 850 nm has a 500 μm cavity length and a refractive index of n 3.7. The gain-wavelength relationship is Gaussian, given by: g(λ)-g(0) exp[-a-h)2 / 201 a) Calcula...
6. A GaAs laser diode operating at 850 nm has a 500 μm cavity length and a refractive index of n 3.7. The gain-wavelength relationship is Gaussian, given by: g(λ)-g(0) exp[-a-h)2 / 201 a) Calculate the frequency and wavelength spacing (Au) and Δλ). b) If at the halfpower point (g-0.5g(0)) we have λ-ho-2 nm, what is the spectral width of the gain, o?
6. A GaAs laser diode operating at 850 nm has a 500 μm cavity length and a...
When you look through a 2.4 mm thick window comprised of a material whose refractive index...
When you look through a 2.4 mm thick window comprised of a material whose refractive index is 1.65, by what time interval is the light you see delayed by having to go through glass instead of air? 5.2E-12 S By how many wavelengths is it delayed, if its vacuum wavelength is 600 nm? wavelengths
A beam of coherent light of wavelength 623nm in air is incident on a rectabgular block of glass with index of refraction n= 1.40 A beam of coherent light of wavelength A0 623 nm in air is incident...
A beam of coherent light of wavelength 623nm in air is
incident on a rectabgular block of glass with index of refraction
n= 1.40
A beam of coherent light of wavelength A0 623 nm in air is incident on a rectangular block of glass with index of refraction n 1.40. If, after emerging from the block, the wave that travels through the glass interfers destructively with the wave that travels through air. We ignore reflection on the block faces. Coherent...
part d and e i want a further explanation (33 Question 19 1 A very thin...
part d and e i want a further explanation
(33 Question 19 1 A very thin film of transparent oil of refractive index_1.40 floats on a smooth hody of water of refractive index 1.33. Above the oil is air, Green light of wavelength 520 nm (in air) is incident normally on to the oil from above." green light, A=520 nm air oil, = 1.40 water, n 1.33 Do light waves reflected at the top of the oil suffer a phase...
Light with wavelength 590 nm in air is incident perpendicularly from air on a film 8.71...
Light with wavelength 590 nm in air is incident perpendicularly from air on a film 8.71 um thick and with refractive index 1.35. Part of the light is reflected from the first surface of the film, and part enters the film and is reflected back at the second surface, where the film is again in contact with air. (a) How many waves are contained along the path of this second part of the light in its round trip through the...
Problem 3 (25 points) A silicon photodetector has an internal photo responsivity of 0.5 A/Wt wavelength of 850 nm. When photons of wavelength 850 nm are incident normally on this photodetector, some photons are reflected back and some photons penetrate to the detection region and are absorbed by the photodetector. (a) The index of refraction of silicon is 3.45. If the electric current measured by this photodetector is 20 mA, what is the incident optical power? (b) Silicon has a...
Prob. 6b (6 pts.) A glass window is coated with a transparent film of refractive index n2=1.25. This film will cause destructive interference in the reflected light when light of wavelength λ = 550nm. is incident normally,on the window. What is the minimum thickness of film required to produce this anti-reflection coating? incident 1 air fim glass 1.25
In the Young’s Double Slit experiment above (set up in air),
light of wavelength 546 nm falls on the two slits. However for the
top slit the light has to pass through a glass container of length
16 mm containing a gas of refractive index ng. When this happens it
is observed that the central maxima (corresponding to equal path
distances) moves to the position of the 14 maxima if glass
container was not present.
Determine the refractive index of...
6. A GaAs laser diode operating at 850 nm has a 500 μm cavity length and a refractive index of n 3.7. The gain-wavelength relationship is Gaussian, given by: g(λ)-g(0) exp[-a-h)2 / 201 a) Calculate the frequency and wavelength spacing (Au) and Δλ). b) If at the halfpower point (g-0.5g(0)) we have λ-ho-2 nm, what is the spectral width of the gain, o?
6. A GaAs laser diode operating at 850 nm has a 500 μm cavity length and a...
When you look through a 2.4 mm thick window comprised of a material whose refractive index is 1.65, by what time interval is the light you see delayed by having to go through glass instead of air? 5.2E-12 S By how many wavelengths is it delayed, if its vacuum wavelength is 600 nm? wavelengths
A beam of coherent light of wavelength 623nm in air is
incident on a rectabgular block of glass with index of refraction
n= 1.40
A beam of coherent light of wavelength A0 623 nm in air is incident on a rectangular block of glass with index of refraction n 1.40. If, after emerging from the block, the wave that travels through the glass interfers destructively with the wave that travels through air. We ignore reflection on the block faces. Coherent...
part d and e i want a further explanation
(33 Question 19 1 A very thin film of transparent oil of refractive index_1.40 floats on a smooth hody of water of refractive index 1.33. Above the oil is air, Green light of wavelength 520 nm (in air) is incident normally on to the oil from above." green light, A=520 nm air oil, = 1.40 water, n 1.33 Do light waves reflected at the top of the oil suffer a phase...
Light with wavelength 590 nm in air is incident perpendicularly from air on a film 8.71 um thick and with refractive index 1.35. Part of the light is reflected from the first surface of the film, and part enters the film and is reflected back at the second surface, where the film is again in contact with air. (a) How many waves are contained along the path of this second part of the light in its round trip through the...
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