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Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

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Related Experiment Video

Updated: Jan 4, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

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Self-phase modulation in single CdTe nanowires.

Chenguang Xin, Jianbin Zhang, Peizhen Xu

|November 6, 2019

Summary

This summary is machine-generated.

Single cadmium telluride (CdTe) nanowires exhibit significant spectral broadening and nonlinear phase shifts when transmitting near-infrared picosecond pulses. These findings highlight CdTe nanowires

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Last Updated: Jan 4, 2026

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Area of Science:

Nanophotonics
Nonlinear Optics
Semiconductor Nanostructures

Background:

Semiconductor nanowires offer unique optical properties due to quantum confinement and high surface-to-volume ratios.
Nonlinear optical effects in nanostructures are crucial for developing advanced photonic devices.

Purpose of the Study:

To investigate the nonlinear optical properties of single cadmium telluride (CdTe) nanowires.
To measure spectral broadening and nonlinear phase shifts induced by self-phase modulation (SPM).

Main Methods:

Transmission measurements of near-infrared picosecond (ps) pulses through individual CdTe nanowires.
Experimental observation of spectral broadening and nonlinear phase shifts.
Extraction of nonlinear-index coefficient (n2) and nonlinear parameter (γ) from transmission spectra.
Numerical simulations of pulse propagation in anomalous dispersion regime.

Main Results:

Significant spectral broadening of approximately 5 nm and a nonlinear phase shift of a few π were observed.
A high nonlinear-index coefficient (n2) of (9.5 ± 1.4) × 10^-17 m²/W at 1550 nm was determined.
A nonlinear parameter (γ) of approximately 1050 W^-1m^-1 was calculated.
Simulations predicted spectral broadening exceeding 1.5 µm for femtosecond (fs) pulses.

Conclusions:

CdTe nanowires exhibit strong nonlinear optical effects, including self-phase modulation.
The extracted nonlinear optical parameters indicate potential for device applications.
CdTe nanowires are promising candidates for developing ultracompact nonlinear optical devices for microphotonic circuits.