Optical methods for power measurement of terahertz radiation

Generation of Terahertz Radiation via Nonlinear Optical Methods

There is presently considerable research activity in the development of the new sources in the terahertz(THz) region of the spectrum. Over the past two to three years, many new techniques were developed for generating especially short or especially powerful pulses. New techniques also allow single shot detection of the THz pulse field as well as realtime and near-field imaging. Recent experimen...

development of different optical methods for determination of glucose using cadmium telluride quantum dots and silver nanoparticles

a simple, rapid and low-cost scanner spectroscopy method for the glucose determination by utilizing glucose oxidase and cdte/tga quantum dots as chromoionophore has been described. the detection was based on the combination of the glucose enzymatic reaction and the quenching effect of h2o2 on the cdte quantum dots (qds) photoluminescence.in this study glucose was determined by utilizing glucose...

Production of high power femtosecond terahertz radiation

The terahertz (THz) region of the electromagnetic spectrum is attracting interest for a broad range of applications ranging from diagnosing electron beams to biological imaging. Most sources of short pulse THz radiation utilize excitation of biased semiconductors or electro-optic crystals by high peak power lasers. For example, this was done by using an un-doped InAs wafer irradiated by a femto...

Efficient measurement of broadband terahertz optical activity

We report a method to determine the four Stokes parameters of each spectral component in a broadband terahertz (THz) pulse by using a continuously rotating analyzer and a standard THz time domain spectroscopy (THz-TDS) instrument. A complete characterization of the polarization state at each frequency is obtained through a single time-domain measurement. Our method requires no specialized THz e...

Optical Radiation Measurement