12 Questions
What characteristic of quantum detectors is wavelength dependent?
Responsivity
How is the quantum efficiency of photoemissive detectors calculated?
By dividing detector area by the radiation sensitivity
What does the Response Time of a detector indicate?
Time taken to reach 63% of its final value
What does Noise Equivalent Power (NEP) measure?
Minimum detectable power
Which type of quantum detector includes Vacuum Photodiode and Photomultipliers?
Photoemissive detectors
How is Quantum Efficiency expressed?
as a percentage
What is the maximum kinetic energy of a photoelectron ejected from a photocathode?
$(K.E)_{max} = h u - \" \phi$
What is the relationship between Detectivity (D) and NEP?
$D = NEP^{-1}$
What is the minimum frequency required to cause photoelectric emission?
threshold frequency ($\nu_c$)
What is the formula for normalized detectivity (D*)?
$D^* = D \cdot A^{1/2} \cdot \" \Delta f^{-1/2}$
What is the threshold frequency for photoelectric emission in a photocathode made of alkali materials?
less than 1.2 \mu m
What is the measurement units of normalized detectivity (D*)?
cm Hz1/2/W
Explore quantum detectors that utilize the photoelectric effect to measure incident light intensity. Learn about photoemissive detectors, photoconductive detectors, photovoltaic detectors, and photoionization detectors in this quiz.
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