1. What is Responsivity of Photodetector?

Responsivity of Photodetector quantifies how much electrical current a photodetector generates in response to a certain amount of incident optical power. It is a key parameter that characterizes the sensitivity of photodetectors to light.

2. How Does the Calculator Work?

The calculator uses the responsivity formula:

Where:

• \( R \) — Responsivity of Photodetector (A/W)
• \( \eta \) — Quantum Efficiency (0 to 1)
• \( e \) — Charge of electron (1.60217662 × 10⁻¹⁹ C)
• \( h \) — Planck constant (6.626070040 × 10⁻³⁴ J·s)
• \( f \) — Frequency of Incident Light (Hz)

Explanation: The formula relates the quantum efficiency and frequency of incident light to the electrical responsivity of the photodetector.

3. Importance of Responsivity Calculation

Details: Accurate responsivity calculation is crucial for designing optical communication systems, photodetector characterization, and optimizing the performance of optical sensors in various applications.

4. Using the Calculator

Tips: Enter quantum efficiency as a decimal between 0 and 1, and frequency in hertz. Both values must be valid (0 ≤ η ≤ 1, f > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is quantum efficiency?
A: Quantum Efficiency represents the probability that a photon incident on the photodetector will generate an electron-hole pair, leading to a photocurrent.

Q2: What are typical responsivity values?
A: Responsivity values typically range from 0.1 to 1.0 A/W for most photodetectors, depending on the wavelength and material properties.

Q3: How does frequency affect responsivity?
A: Higher frequency light (shorter wavelength) generally results in higher responsivity, as each photon carries more energy.

Q4: What units are used for responsivity?
A: Responsivity is measured in amperes per watt (A/W), indicating how many amperes of current are generated per watt of incident optical power.

Q5: Are there limitations to this formula?
A: This formula assumes ideal conditions and may not account for all real-world factors such as temperature effects, material imperfections, or nonlinear responses at very high light intensities.