Terahertz generation processes and imaging process thereof

1. An imaging process comprising:

providing susceptible magnetic particles capable of being energized to produce a lasing output;

magnetically energizing the susceptible magnetic particles to thereby produce a lasing output; and

accumulating the resulting lasing output of the particles;

wherein the lasing output is terahertz radiation with a wavelength from about 0.1 micrometers to about 1.0 meters and a power output of from about 0.01 to about 10 kilowatts per kilogram of the magnetic particles when the process is 100 percent efficient.

2. A process in accordance with claim 1 , wherein the susceptible magnetic particles are selected from the group consisting of a Mn 12 O 12 (OAc) 12 (H 2 O) 4 compound, an iron bromide triazacyclononane complex, and mixtures thereof.

3. A process in accordance with claim 1 , wherein the susceptible magnetic particles are selected from the group consisting of a compound and mixture of compounds, with a magnetic spin of 10.

4. A process in accordance with claim 1 , wherein the susceptible magnetic particles have long lived metastable states with lifetimes from about 0.01 to about 10.0 microseconds at non-zero magnetic fields.

5. A process in accordance with claim 4 , wherein the non-zero magnetic fields are from about 0.5 to about 5 Tesla.

6. A process in accordance with claim 1 , wherein the step of magnetically energizing is accomplished by exposing the susceptible magnetic particles to electromagnetic radiation with a power range in an amount of from about 1 milliwatt to about 1 watt and with a frequency of from about 1 GHz to about 1 THz.

7. A process in accordance with claim 1 , wherein the susceptible magnetic particles have a volume average diameter from about 1.0 to about 100 nanometers and a narrow polydispersity of from about 1.0 to about 1.5 geometric size distribution(GSD).

8. A process in accordance with claim 1 , wherein the step of magnetically energizing causes the susceptible magnetic particles to exhibit quantum resonant magnetization tunneling and a magnetic hysteresis curve having a plurality of steps.

9. A process in accordance with claim 8 , wherein the plurality of steps of the magnetic hysteresis curve is from about 2 to about 21 steps.

10. A process in accordance with claim 1 , further comprising the step of tuning the lasing output by manipulating the magnetic field and the temperature.