HEP Thin Films Biweekly

Tuesday 18 Aug 2026, 11:30 → 12:30 US/Pacific

Useful info:

• Google Drive: https://drive.google.com/drive/u/1/folders/0APSxdpDBE2RzUk9PVA
• Github space: https://github.com/hepthinfilms

 

Zoom link: https://ucsc.zoom.us/j/93578483281?pwd=KzNUK3FQOE5FNzZmbXB4V1U2ajUzdz09

1 Single-pad InP characterization paper update

Overleaf: https://www.overleaf.com/project/6916482c7c9af29611dcb701

Speakers: Earl Russell Tang Almazan (University of California,Santa Cruz (US)), Dr Jennifer Ott (University of California,Santa Cruz (US))

Meeting minutes

Attending: Shiva, Katie, Max, Taylor, Sungjoon, Jenni, Shubhankar, Richville

 

General

-        https://github.com/hepthinfilms - RIL people and ANL all missing, resend invites

-        Larger group (incl e.g. Mathieu, Timon) HEP Thin Films meeting at CPAD? Zoom meeting already before? Maybe in the next weeks, once Mike is back

-        NSF opportunity? https://www.nsf.gov/funding/opportunities/mps-materials-mps-materials-research-programs/nsf26-521/solicitation

-        UH umbrella grant renewal: include some Thin Films readout

-        Conversation about CXR

 

Sungjoon

-        Waiting for decision by lab leadership on funds for Jessica 

-        Considering to transfer tool to Sungjoon’s division to ease access

-        Jenni needs to send older slides to Sungjoon

-        Mike looking into vendors for InP?

-        Coated some ITO glass to be deposited with aSe

-        Group gathering at ANL?

 

Max

-        Open-source tool simulation: including steering voltages; estimate of charge collection – only between two anodes

-        Presentation to walk through sw in more detail next meeting, to facilitate use by other students

-        Add to Github – look for invite, generate new repo or other structure as appropriate

Katie

-        Multilayer Se/Se-Te samples, ca. 8 nm each, 150 nm total

-        SEM, SEM-EDS, ellipsometry

-        PDS system for high-level absorption spectroscopy

-        TOF-SIMS to UCSB

-        Still looking for DLTS

-        Ready to fabricate on Si wafers to test for avalanche performance

-        Start building simulation to understand E field in these devices to be ready for comparison with devices

-        ‘corners’ in aSe on TFT: higher performance, but also burn-out. For future CMOS device, try to avoid these areas. Understand heigh / aspect ratio of pixels...

-        What info to provide to Taylor? – schematic, biasing

 

Taylor

-        Waiting for work 😉

-        Contact resistance sweep

-        Transient responses: do already, or wait until material more defined?

-        InP of complex device not converging without traps: maybe in interface? ‘block’ of InP was okay

-        Bring down currents from trap by contact resistance?

-        Adapt Cr/Au for contacts!

UH

-        Check how low trap concentration can go before stopping to converge? - Ca. 1e12

-        Shubhankar: try to run multipad Sentaurus TCAD transients from Taylor’s 2D or 3D geometry (e-fields already done previously)

-        Shubhankar / Christian: installed Thorlabs focusing optics; switched to red laser, now working on collimating – resolution still not good

2 Argonne update

Speakers: Jessica Metcalfe (Argonne National Laboratory (US)), Sungjoon Kim

3 UHawaii update

Speakers: Dr Jennifer Ott (University of California,Santa Cruz (US)), Richville Fagaragan (University of Hawaii at Manoa)

4 RIL update

Speakers: Kaitlin Hellier (University of California, Santa Cruz), Shiva Abbaszadeh

5 SCIPP update

Speakers: Earl Russell Tang Almazan (University of California,Santa Cruz (US)), Taylor Shin, Vitaliy Fadeyev (University of California,Santa Cruz (US))

6 AOB