# Design of a terahertz parametric oscillator based on a resonant cavity in a terahertz waveguide

## Abstract

We demonstrate ns-pulsed pumping of terahertz (THz) parametric oscillations in a quasi-triply resonant cavity in a THz waveguide. The THz waves, down converted through parametric interactions between the pump and signal waves at telecom frequencies, are confined to a GaP single mode ridge waveguide. By combining the THz waveguide with a quasi-triply resonant cavity, the nonlinear interactions can be enhanced. A low threshold pump intensity for parametric oscillations can be achieved in the cavity waveguide. The THz output power can be maximized by optimizing the quality factors of the cavity so that an optical to THz photon conversion efficiency, η{sub p}, of 0.35, which is near the quantum-limit level, can be attained. The proposed THz optical parametric oscillator can be utilized as an efficient and monochromatic THz source.

- Authors:

- Department of Materials Science, Graduate School of Engineering, Tohoku University, 6-6-11-1021, Aoba-ku, 980-8579 Sendai (Japan)
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, 980-8577 Sendai (Japan)

- Publication Date:

- OSTI Identifier:
- 22308511

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CAVITY RESONATORS; CONVERSION; DESIGN; EFFICIENCY; GALLIUM PHOSPHIDES; INTERACTIONS; MONOCHROMATIC RADIATION; NONLINEAR PROBLEMS; OPTICAL PUMPING; OPTIMIZATION; OSCILLATIONS; PARAMETRIC OSCILLATORS; PHOTONS; PULSES; QUALITY FACTOR; THZ RANGE; WAVEGUIDES

### Citation Formats

```
Saito, K., E-mail: k-saito@material.tohoku.ac.jp, Oyama, Y., and Tanabe, T..
```*Design of a terahertz parametric oscillator based on a resonant cavity in a terahertz waveguide*. United States: N. p., 2014.
Web. doi:10.1063/1.4891838.

```
Saito, K., E-mail: k-saito@material.tohoku.ac.jp, Oyama, Y., & Tanabe, T..
```*Design of a terahertz parametric oscillator based on a resonant cavity in a terahertz waveguide*. United States. doi:10.1063/1.4891838.

```
Saito, K., E-mail: k-saito@material.tohoku.ac.jp, Oyama, Y., and Tanabe, T.. Mon .
"Design of a terahertz parametric oscillator based on a resonant cavity in a terahertz waveguide". United States.
doi:10.1063/1.4891838.
```

```
@article{osti_22308511,
```

title = {Design of a terahertz parametric oscillator based on a resonant cavity in a terahertz waveguide},

author = {Saito, K., E-mail: k-saito@material.tohoku.ac.jp and Oyama, Y. and Tanabe, T.},

abstractNote = {We demonstrate ns-pulsed pumping of terahertz (THz) parametric oscillations in a quasi-triply resonant cavity in a THz waveguide. The THz waves, down converted through parametric interactions between the pump and signal waves at telecom frequencies, are confined to a GaP single mode ridge waveguide. By combining the THz waveguide with a quasi-triply resonant cavity, the nonlinear interactions can be enhanced. A low threshold pump intensity for parametric oscillations can be achieved in the cavity waveguide. The THz output power can be maximized by optimizing the quality factors of the cavity so that an optical to THz photon conversion efficiency, η{sub p}, of 0.35, which is near the quantum-limit level, can be attained. The proposed THz optical parametric oscillator can be utilized as an efficient and monochromatic THz source.},

doi = {10.1063/1.4891838},

journal = {Journal of Applied Physics},

number = 4,

volume = 116,

place = {United States},

year = {Mon Jul 28 00:00:00 EDT 2014},

month = {Mon Jul 28 00:00:00 EDT 2014}

}