Use this semiconductor calculation for first-order device, material, fabrication, interconnect, packaging, or reliability estimates when every coefficient and unit convention is known.

Resonance Hertz (Hz)

Required number in Hz.

Linewidth Hertz (Hz)

Required number in Hz.

The cited overview of Photonic crystal supplies background for the terminology and domain context used by this tool.^[1]

Loaded photonic-crystal cavity quality factor from measured resonance frequency and full-width-at-half-maximum linewidth. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Loaded Quality Factor

Returned number.

• Material composition, geometry, process history, temperature, electric field, bias, interfaces, parasitics, and fitted parameter ranges can invalidate a compact semiconductor model.
• Resonance Hertz must be at least 0.
• Linewidth Hertz must be at least 0.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Compare the estimate with measured process data, current device documentation, and a higher-fidelity circuit, field, thermal, quantum, or TCAD model when the decision requires it.

• Ring Resonator Q Factor Calculator

  Compute the quality factor of an optical ring resonator from its resonance wavelength and full-width half-maximum linewidth.

• Avalanche Breakdown Voltage Calculator

  Estimate one-sided abrupt-junction avalanche breakdown voltage from the peak critical field and depletion width: Vb ≈ Ecrit·W/2. The factor 50 converts MV/cm·µm to volts and includes the triangular-field factor of one half. The estimate neglects curvature, edge termination, and the full ionization integral.

• Varactor Quality Factor

  Series-loss quality factor of a varactor at a specified frequency from capacitance and effective series resistance.