Terahertz Time-Domain Spectroscopy of Ices of N$_{2}$, CO$_{2}$, and Ar

We used Terahertz Time-Domain Spectroscopy (THz- TDS) to study thin ice films of N$_{2}$, CO$_{2}$, and Ar from 0.1 -1.6THz. We observed an absorption line for N$_{2}$ ice films at 1.46THz in the temperature range of 10-28K. Ar ice films have absorption lines at 0.47THz and 0.97THz in the temperature range of 10-30K. We observed no absorption line for CO$_{2}$ ice films in the temperature range of 10-40K from 0.1-1.6THz. These results will be helpful in analyzing the data terms from observations of THz radiation from astronomical sources impinging upon interstellar materials.