


BIGFOOT
Collinear Ultrafast Spectrometer
The BIGFOOT spectrometer by MONSTR Sense Technologies is a multi-functional tool for state-of-the-art optical measurements. We combine the most advanced ultrafast measurements of vibrational and electronic sample properties into a single device: transient absorption, coherent Raman, and multidimensional spectroscopies. The spectrometer will also perform linear absorption spectroscopy to accompany the more advanced methods. Our spectrometer is very easy to use with a one-time alignment of a laser into the device and intuitive LabVIEW based software.
Many spectroscopic techniques
Research is never easy, but your equipment should not limit you. Get the most out of your sample with the best resonant and non-resonant ultrafast spectroscopy techniques. One BIGFOOT collinear spectrometer is capable of all of the following:
Our transient absorption spectrometer is the only fully-collinear technique capable of resonant pumping. Measure ultrafast dynamics of resonantly excited transitions without convolving or dephasing the dynamics you care about with non-resonantly excited states. You may also spectrally resolve either the emission or the excitation using the built-in Fourier-transform spectroscopy. Spectrally-resolved transient absorption is useful for identifying multiple sources of decay in features with different spectral signatures.
Coherent Raman Spectroscopy (CRS)
Also called impulsive stimulated Raman (ISRS), the MONSTR Sense spectrometer is capable of measuring both ground and excited state vibrational resonances. When applied to imaging biological samples, it is often called label-free imaging. Coherent Raman spectroscopy enhances Raman signals by up to nine orders of magnitude, and so our spectrometer is a great tool for rapid measurement of dense samples.
Multidimensional Coherent Spectroscopy (MDCS)
MDCS is the spectroscopy for completely measuring the third order nonlinear optical response of a material. The BIGFOOT collinear spectrometer was originally developed for MDCS, and it allows you to use a variety of pulse sequences to completely characterize inhomogeneous samples and coupling. Check out our Photonics Spectra article for an overview.
Related Publications
- Coherent interactions in monolayer MoSe2/WSe2 heterostructure
- Homogeneous linewidth measurement in monolayer MoSe2
- Using silicon vacancy centers to probe strain tensor in diamond
- Identifying hidden vacancy centers in diamond
- Coherent coupling between individual quantum dots
- Measuring high-order correlations in cavity polaritons
- BIGFOOT with NESSIE: [FEATURED] Imaging dynamics in transition metal dichalcogenide heterostructures
Software controlled
Not only can one device perform multiple spectroscopies, we have designed this instrument so that all aspects of every experiment are software controlled. Parameters are calculated in the computer controller, and most of the signal processing is performed by our carefully designed electronic system.
- Center wavelength: our electronics will generate reference scan parameters optimized for the center laser frequency. This is done on-the-fly, so this feature is great for frequency sample changing and tunable lasers.
- Optical bandwidth: There is a trade-off between optical bandwidth and how quickly the delay stage can be moved. Our software knows this trade-off and will set the optimal scan parameters for your bandwidth to save you time.
- Optical resolution: There is a trade-off between scan duration and resolution. The MONSTR Sense spectrometer is capable of measuring your samples with very high (5 pm) resolution. But if you don’t need that resolution for some measurements, this can be changed anytime to save you time.
- Delay range and resolution: Whether you want to measure a decay time or frequency resolve vibrational states, the software will determine the right parameters for your system. Software is also capable of linear or random sampling.
Additional features
Aligned by design
Our double-pass design is very robust, and our baseplate and mounts are custom machined so that our spectrometers do not require alignment.
No calibration needed
Because all measurements are made with respect to an ultrastable Nd:YAG laser as a reference, these spectrometers NEVER require calibration.
Passively stable to vibrations
We bring the passive stability of IR interferometry and spectroscopy to visible wavelengths by our patent pending referencing technique.
BIGFOOT Multi-functional ultrafast spectrometer specifications
Specification | Standard System | Optional Modifications |
---|---|---|
Wavelength range | 530-980 nm | 350-500 nm, 950-1300 nm |
Optical bandwidth | up to 60 nm | up to 200 nm* |
Spectral Resolution | 0.04 meV (0.02 nm) | down to 0.01 meV (0.005 nm) |
Delay range | 330 ps | up to 3.3 ns |
Delay step size | 0.3 fs | 0.3 fs |
Supported laser rep rate | 50 kHz – 100 GHz | Contact us |
Interferometric precision | 0.1 fs | 0.1 fs |
Dimensions | 16 × 24 in (40 × 60 cm) | 16 × 24 in (40 × 60 cm) |
* We encourage purchasing our low dispersion upgrade and possibly a dispersion compensation system for extremely broad bandwidths.
Consider merging BIGFOOT with our NESSIE microscope
When combined with our NESSIE laser-scanning microscope, you get one powerful system. Acquire ultrafast movies in seconds, and zoom in on regions of interest for high resolution scans.
On an overview image select a set of points and completely characterize the electronic and vibrational modes at each of those points with BIGFOOT’s full set of coherent techniques.
Interested in one coherent feature in particular? Measure images with one of many functional image modes.
The NESSIE microscope is designed to handle a wide range of wavelengths and provide imaging control over the entire microscope objective’s field of view. Imaging controls include: pixel resolution, scan rate, and region of interest. When merged with BIGFOOT, NESSIE allows you to completely correlate electronic structure with spatial inhomogeneity using decay constant maps and hyperspectral images.
For more information or to get on our mailing list please reach out to us at info@monstrsense.com or using our contact page.